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IAC+SENSOR CHINA, as the predecessor of Sensor China, has been accumulating experiences and resources in sensing industry for 21 years. After strategic adjustment and cooperation with significant partners, IAC+SENSOR CHINA updates itself into SENSOR CHINA 2019, which dedicates in field of sensors. With the purpose of establishing a professional platform, SENSOR CHINA endeavors to become the biggest, most professional and authoritative industrial platform based on the rapidly developing sensing industry in China. In recent years, thank to the introduction of concepts like industry 4.0, industrial internet and IoT, markets of smart home, wearable devices, smart city and smart traffic are expanding quickly. IoT has large demand on sensors. For now 3-5 billion sensors are being used, and the number will reach 100 billion in 2020. This means that sensor industry is embracing a future of prosperity. Holding this opportunity in hand, SENSOR CHINA 2019 works with enterprises and organizations to build up a sensor industrial ecosystem in Asia, so as to push forward the development of the whole industry. SENSOR CHINA 2019 will take place in Shanghai Convention & Exhibition Center of International Sourcing(SHCEC). Located at the center of Yangtze River Delta Region, Shanghai has become the gathering place of high-end manufacture and incomparable traffic junction. This metropolis, with 30% of foreign-funded R&D centers in China, is constructing the "Chinese Silicon Valley", a global science and technology innovation center. SHCEC lies in the prime area in central Shanghai, where enjoys excellent traffic, infrastructure, equipment and service of expos, making it the ideal choice for a first-class exhibition. Facing dual challenge of homogeneity and price dropping, sensor industry in China needs to follow the subdivided demands of IoT field to get the entrance of high growth industry. Industry map of smart sensors has established promotion movement of three major industries, which are beneficial for application of new technology and promotion of new business mode. ISweek is also invited to the expo. As a reputable online sensor sales platform in China, ISweek has always been devoting itself to comprehensive promotion of sensors in China, and has close cooperation with famous sensor manufacturers globally. For this exhibition, ISweek will present humidity&temperature sensors, PM2.5 sensors, gas sensors, UV sensors, industrial grade oxygen sensors and gas sensing modules, etc. For measurement of temperature and humidity, we bring about sensor with digital output-HTU21D, module with analog output- HTG3535CH and humidity sensor – HM1500LF. The temperature&humidity sensor is the combination of capacitive humidity sensor and NTC temperature sensor which adopts I2C or analog voltage output for the convenience of signal processing. It is featured with high reliability and long-term stability. At present these sensors are widely used in smart homes, temperature & humidity instruments and realms requiring mass production and high measurement accuracy. PM2.5 sensors are based on working principle of laser or IR. They are able to measure particles including PM1, PM2.5, PM10 and so on. With features of high accuracy, fast response and compact size, they are widely applied in air purifiers and smart homes, etc. Flow sensor: Based on MEMS flow sensing chip, the sensor is featured with low power consumption, easy installation, wide measurement range and high accuracy. The sensor is specially packaged, making it convenient to fit in various pipe diameters. SST oxygen sensor: LuminOx sensors is a kind of non-consumption device which measures oxygen content based on the principle of fluorescent quenching. The sensor is basically free from cross interference and pressure change. It is of UART output and RoHS certification. Working in temperature range between -30 to 60℃, it has a service life of 5 years. Zirconia oxygen sensor: Measurement range: 0.1-25% and 0.1-100% of O2; output mode: 0-10V,4-20mA and RS232 or RS485. Figaro semi-conductive sensors are featured with high sensitivity, fast response, low cost and long-term stability. Figaro products include sensor detecting combustible gas, toxic gas, CO, H2, NH3, alcohol and air quality. For now these sensors have been used in professional alarms of combustible gas and industrial toxic gas, and air purifiers. UV sensor: The photoelectric diodes and UV probes of these sensors are made of high density of GaN. UV sensors are widely used in UV determinators, water and air quality improvement, UVI index measurement and detection of flame and electric sparks. Industrial graded oxygen sensors: in this series there are sensors based on principles of electrochemistry and ion flow, covering measurement of constant, high concentration and trace oxygen. These sensors are applied in chemical engineering, petroleum extraction, 3D printing, coal mining and power plants. Industrial CO2 sensor: Based on NDIR principal, these sensors cover full range from 1-100% of oxygen 3.5mW of low power consumption. They are battery-powered, with UART output and RoHS certification. Now the sensors are used for preservation of cultural relics, incubators, storage and transportation of fruits, and granaries. Industrial gas sensors for toxic gas: ISWeek provides various toxic gas sensors based on PID which can detect gases including SO2, CO, NO2, NH3, HCL, CL2, H2S and VOCs. These products are extensively applied in industries like coal mines, petroleum, chemical engineering and tunnels. Gas sensing module: We have 3 groups of sensing module products respectively for combustible gas, methane and air quality. This type of products modularize the sensors and circuits for convenience of development and use. Such modules are of low cost, high stability, small size and high accuracy.

UV sterilizing lamp is actually a kind of low pressure mercury lamp. It activates low pressure (<10-2Pa) mercury vapor to emit UV light. The spectral lines are mainly of 253.7nm and 185nm, which are both invisible. Applications of UV sterilizing lamps 1. Surface Sterilization: Surface sterilization requires the surface to be clean and smooth enough so that the surface can be completely irradiated. If the matter surface is tough, exposure time should be prolonged on two sides of it. Applications include sterilization of household floor, table surface and vacuum packaging of foods. 2. Water Sterilization: UV lamps can only be used on transparent water, since its function will be affected in turbid liquid. Do remember not to dip the modulator tube in the liquid, and the depth of water must be no more than 2cm. The light intensity should be over water 90000uw/cm2 to be effective to sterilize the water. 3. AirSterilization: UV lamps can be used in family rooms, hospital wards and laboratories for air sterilization as they can change the genetic materials of living organism to kill the bacteria in the air. 4. Food Sterilization: UV eliminates bacteria in micro organism to stabilize food quality, so as to prolong its expiration date. UV ray is capable of penetrating cells and kill them, so be careful do not let it directly irradiate on human skin, especially on eyes. Do not stare at UV lamp directly with naked eyes, but with glasses it is OK, since that shortwave UV cannot penetrate glass. Generally, even if eyes are burned by UV, the consequence will be no worse than sunburn, and severe cases can be solved by dropping eyewash or human milk. Also, do not use ozone lamps, as high concentration of ozone can be poisonous. UV sterilizers can be widely applied in schools, hospitals, nurseries, cinemas, buses, offices and families. They can purify the air, eliminate musty taste and also generate negative oxygen ion. That`s why air in UV sterilized rooms are specially fresh. In public space, UV sterilizers can effectively prevent bacteria diffusion via air or matter surfaces. UV sterilizing sensors are of high stability and long service life of 9000 hours. Its light transmittance is as high as 87% through quartz glass tube, and illumination intensity keeps steadily at 253.7m. If the lamp is broken, sound-light alarm will take place to remind people. The UV sterilizers are made of 304L or 316L stainless steel, the main body of the sensor is polished inside and outside to improve UV irradiation intensity, so as to ensure that the bacteria are completely eliminated. Now we ISWeek would like to introduce two types of UV sensors used in sterilization applications. The first one is GUVV-T10GD produced by Korean company Genicom. Its chip is as small as 0.4mm, made of InGaN material and TO-46 packaged. It operates in photovoltaic mode with high response and low dark current. This product can be applied in monitor on entire UV waveband, UV lamp monitor on UVA waveband and sterilizer monitoring. The other one is GUVC-T10GD UV sensor. Its chip is as small as 0.4mm, made of AlGaN material and TO-46 packaged. It operates in photovoltaic mode with high response, low dark current and nice solar blindness. It can be applied in measurement and control of UV intensity, UV index measurement, outdoor UV index measurement equipment. It can also be used in UV sterilization, UV curing and flame detectors.

Recently, PM2.5 and pollutant emitted in industrial parks are shading the sky with a gray veil. In order to save the freshness of the air, atmospheric environmental protective organizations and scientific industries are taking efforts on gas sensing technology, so as to monitor the status of air pollution in real-time and take actions in advance. PM2.5 are particle pollutants with an aerodynamic diameter of 2.5 μm or less in form of liquid or solid. Sources of particulate matter can be natural or anthropogenic. PM2.5 are often generated from carbon, nitric oxide, sulfur oxide, ammonia and VOCs. VOCs are believed to be a major drawback of indoor air quality, with its relevant organics bringing chronic and long term harm on human health. Long time exposure to VOCs (like formaldehyde) will cause allergy on throat and eyes, dizziness, headache, weariness, and even raise the risk of nervous system diseases, cancers and accumulation of toxin in liver and kidney. Generally speaking, pollution source of VOCs can be everywhere, being colorless and scentless so that people will unconsciously breathe them in. VOCs can be hidden in not only household construction materials, cleaning supplies, adhesive, dust mite and flooring, but also in engines of factories and vehicles in forms of comburent and oxide. What`s worse, in offices where people works everyday, there are also poisonous matters like benzene, styrene and phenol in PC and multi-functional printers. Breathing too much VOCs will make harmful effects on human metabolism and function of the liver, and even lead to chronic diseases like diabetes. Also, it is highly possible that the toxic gas entering pulmonary alveoli remain in the lung or even penetrate into the inspiration system, leaving lasting damage on human body. Environment pollution lies health risk on human body, that`s why gas sensors are created to detect concentration of chemicals in the air. Effective monitoring on various poisonous matters make it possible for people to take precaution actions against pollution. Now ISWeek supplies professional PM2.5 and VOC sensors which are widely applied for civil and industrial use. These products include: Features of PM2.5 sensor (for civil use) PDSM010: * Customized sensitivity for effective control in applications * Capable of measuring particles of 1㎛ * MCU control (factory calibration) * easy maintenance * PWM output (low logic pulse activation) * noise resistance Features of PM2.5 sensor (for industrial use) OPC-N2: * Capable of detecting particles of 38~17um * Laser detection, built-in fan * Equipped with SPI and USB interfaces * High accuracy, coincidence rate can be low as 8% Features of PM2.5 Particle Sensor(for industrial use) OPC-N3: * Capable of detecting particles of 38~40um * Laser detection, built-in fan * Equipped with SPI and USB interfaces * High accuracy, coincidence rate can be low as 8% Features of PM2.5 sensor OPC-R1 (low-priced version of OPC-N2) : * Capable of detecting particles of 4-12.5um * Laser detection * Equipped with SPI interface * High accuracy, coincidence rate can be low as 8% Features of FAM-001-01 Air Quality Detection Module (for civil use): * Circuit module design based on TGS2600 * Low power consumption * Long service life * High selectivity to gas of low concentration * High sensitivity to cigarette or kitchen smell and organic solvent volatile gas * Six classes of pollution Features of PID sensor (for industrial use) PID-A1: * Large measurement range of 0~6000ppm * The lamp works on 6eV * Long service life of the lamp as 5000 hours * Capable of detecting most of VOC gases * Linear output

Fresh air system is an independent air processing system consist of an air supply system and an exhaust system. The systems can be distinguished as system with pipelines and system without pipelines. The fresh air system with pipelines is consist of fresh air ventilator and pipe fittings while non-pipeline type works with only fresh air ventilator. They both introduce fresh air inside, and the pipelines can emit the exhaust air outside. The system with pipelines requires more engineering, so it is ideal for industrial use or large office area, while non-pipeline type system is relatively more suitable in household for its easy installation. [1] (In 1935, Alston·Ceeyee invented and manufactured the first heat exchange equipment which can filter polluted air in the world, and it was also called fresh air system.) Gas sensor is a device that transfer information of gas content and concentration into data that is available for staff, instruments and computers. The volume fraction of a certain gas can be transferred into corresponding electric signals. The probe conditions gas sample, often includes filtering impurity and interfering gas, drying and refrigeration via gas sensors. Now, gas sensors are widespread in the market and applied in civil, industrial and environmental realms. Categories of gas sensors are being enriched. At present, there are no fewer than 5 kinds of gas sensors in the market, including semi-conductor, solid electrolyte, contacted combustion, electrochemical type and photoelectric type. Certainly, gas sensors are necessary for air environment monitoring. In recent years, sensors detecting CO2, PM2.5, formaldehyde, VOC, temperature and humidity are widely applied in fresh air systems to monitor environmental air quality in real time. ISweek technical engineers would like to recommend following CO2 sensors for you: CO2 sensor ZG09:with long term stability enhanced by adoption of dual beam NDIR, this sensor is suitable in applications for IAQ, greenhouse cultivation, HVAC and DCV. ISweek technical engineers would like to recommend following PM2.5 sensors for you: Korean syhitech particle sensing module PM2.5 sensor PDSM010:PM2.5 sensor PDSM010 is capable of measuring particles of 1㎛, like indoor dust, pollen, microorganism, dust mite and cigarette smoke. It can also measure the concentration of floating particles in a space no larger than 30㎥. This sensor is suitable for indoor automatic air monitoring system, like air purifiers. PM2.5 sensor The signal of PDSM010 is transferred into PWM output through internal circuit and MCU program; moreover, the filter circuit and MCU program is able to remove noise to keep the performance stability of the equipment when noise interferes the signal. PM2.5 sensor PDSM010 is of stable detecting capability and high productive efficiency. Different from the former type models(DSM), there is no additional control point(VR Trimmer) on the sensing device. Potential risks caused by random modifying of users can thus be prevented. Japan figaro laser PM2.5 sensor TF-LP01:TF-LP01 laser particle sensors are small modules that detect dust in the air based on scattering theory. They are of small size, high accuracy, excellent repeatability and consistency. This type of sensor can respond in real-time and implement continuous collection with high interference resistance and ultra silence. All sensors are 100% tested and calibrated when leave factor. ISweek technical engineers would like to recommend following temperature&humidity sensors for you: Digital temperature & humidity sensor HTU21D: As a new type of digital complex sensor, HTU21D has become a role model in the size and intelligence of humidity sensors: it adopts DFN packaging which is suitable for reflow soldering; it is as small as 3 x 3 x 1mm, and provides calibrated linear I²C digital output signal. HTU21D is a plug-and- use temperature&humidity complex sensor that is ideal for OEM applications which require reliability and accuracy. Its digital output of humidity and temperature signals are able to interface micro controllers. Every sensor is calibrated and tested, with its batch number not only on the case but also stored in the chip so as to be read by a command. Users can send a command to change the resolution of HTU21D(8/12bit to 12/14bit). Moreover, sensors can also detect low power, calibrate and improve communication reliability. With its low power consumption and small size, HTU21D can be the perfect replacement of SHT21 and SHT20. It is highly cost effective, making it suitable for the price-sensitive OEM users to apply in applications with limited installation space and large amount. ISWeek also offer discounts for large orders of HTU21D, please contact us if interested. This type of sensors are applied in motors, vehicles, medical care, industrial control, consumer electronics and household appliances. Analog voltage output temperature&humidity sensing module HTG3515CH: This temperature & humidity sensor is based on humidity sensitive capacitors developed by Humirel. HTG3515CH is a module with temperature&humidity integrated output interface and micro control chip. It output humidity in linear voltage, and output temperature with 10Kohm NTC. This product is specially designed for OEM clients whose application requires reliable and precise measurement. ISweek technical engineers would like to recommend following VOC sensors for you: P-type semi-conductive VOC sensor VOC-MF1,VOC-PF1,VOC-AF1: VOC sensors VOC-MF1,VOC-PF1,VOC-AF1 are broadband total VOC detectors. When considering the cost of PID, these types of gas sensors can be used to detect 10~50ppb of VOCs, and more details depend on the variety of VOC, like formaldehyde or toluene. Different from common N-type sensors, this metallic oxide sensor is of wide dynamic range, repeatable response and slight influence towards humidity. Also, its resistance will rise when contact most of VOCs. The resistance can be easily transferred into output voltage via simple electric circuit. It`s OK for the sensors to work under constant temperature/ constant pressure mode though, it gives best response when working in temperature circulation between 400℃ (sensing temperature)~525℃ (reset temperature). Please see more details in application notes. Working mode of fresh air system is automatically controlled to save energy. "Imagine this: when you wake up in the morning, the smart curtain unfolds to let sunshine in, and fresh air ventilator bring you the sweet breeze outside. It`s for sure that you will enjoy a nice day." The fresh air system works in an intelligent way: when the atmosphere changes, sensors transfer the measured concentration value into digital or analog signals and send them to data the collector, and then the data is sent to the central processor, which controls each controller to turn on or off to adjust wind strength and filter the air. Sensors supplied by ISweek that measure CO2, PM2.5, VOC, formaldehyde, temperature and humidity are extensively applied in fresh air system manufactures in home and abroad.

Photoionized (PID) detectors are often applied in Plant boundary online VOC monitor system, polluted air and VOC monitor equipment in industrial parks, and high accuracy VOC monitor systems to detect VOCs . Conventional VOC gas detectors often use sensors based on catalytic combustion, so they respond slowly to C5 and gas over it, and may easily be poisoned. PID detectors solve such problems well. With fast response and no poison, they can be used as VOC gas detectors down to PPB level.PID is a kind of photoionized detector with high sensitivity and a wide range of application. PID gas sensors manufactured by Alphasense (UK) are used to detect low concentration of VOCs and other poisonous matters, among which PID-A1 Photoionization Gas Sensor (PID Sensor) is used to measure level between 1ppb-50ppm, which PID-AH is for50ppb-6000ppm. Functional features of plant boundary online VOC monitor system, polluted air and VOC monitor equipment in industrial parks, and high accuracy VOC monitor systems: 1) standard technical route: the complete configuration system is provided complying with relevant national standards; 2) high-class software platform: multi-site data integration, analysis, report and issue via central site software platform 3) scientific algorithm: Gaussian plume model and judgmental algorithm of distributed redundant nodes are applied to realize the functions including stationing, comprehensive monitoring, calculation of pollutant diffuse trend and resolution of VOCs emission source. 4) precise monitor data: capable of detecting various kinds of gas simultaneously with high sensitivity, time and spatial resolving ability; 5) advanced software kit: data collection, analysis and visual software is applied to enhance monitor efficiency. 6) leading global trend of PID development: the third generation of intrinsic safety PID sensors are developed independently, and have won several international patents. These sensors are of faster response, stronger moisture resistance and larger measurement range while being capable of exchanging sensors without any tools, and supporting offline calibration; 7) PID patented self-cleaning technology: ensure the long-term performance of the sensor, extend its service life; 8) unique pump suction sampling: built-in powerful pump type, large measurement range , fast response and recover, sensitive smell; 9) ultra wide measurement range, range can be freely set, and the accuracy can reach ppb level; 10) 3G open flow-through structure: double the measurement range, shorten response time by 10s, prolong maintenance-free period; 11) intelligent algorithm for temperature and zero point compensation: enable the instrument to present better performance; 12) capable of detecting thousands of gases: wide spectrum detection, in-built gas library, convenient for users to choose; 13) multiple signal output:fine adjustable 4~20mA(three-wire system), RS485 Modbus, three-step digital output (optional normally open/closed) ; The picture below is a common VOC emission detection alarm system used in factories, and online VOC monitor system on plant boundaries:

With the acceleration of urbanization, intellectualization of public facilities has been the symbol of [smart city". As public places in a city, public toilets need to be kept clean with fresh air and neat ambient environment to show the good image of the city. Public toilet is an indispensable part in urban public service facility and a display of city image and public service level. Public toilets also influence the sanitary level of an avenue, a district and even a whole city. There are many problems in management of urban public toilets: Large amount and low efficiency of basic data management of public toilets; Public toilets being too dirty and unsightly for dwellers to use; The amount, scale and facility of public toilets being obsolete and outdated; Delayed response toward problems; Few participation of city dwellers on monitoring. Therefore, in order to enhance the management level of public toilets comprehensively, a long-term management mechanism should be established. Smart public toilets are important for comprehensive construction of a modernized smart city. They introduce intelligent remote management techniques including flow monitor, smell detection, position detection and automatic deodorization. Latest technologies like IoT and cloud computing are applied to realize the perfect combination of toilet management and intelligent technology. "Smart toilets" can not only eliminate the peculiar smell, but also enable the sanitation of toilets to be managed in a scientific manner, so that the urban environment management can be more efficient, intelligent and well-aligned. Comprehensive technology of IoT, communication and interconnection techniques and existing resources are utilized to establish management database and real-time monitor platform for public toilets. The modernized restructuring of public toilets enables new functions including collection, transmission and analysis of performance data, and bad smell monitoring. Application of smart toilets not only enhance the service experience of public facilities, but also promote the civilization, reputation of the city. Meanwhile, smart toilets can save energy, protect the environment and to a certain extent, promote economic development. Public toilets are often avoided by people for their bad smell. By installing a built-in smell sensor in conventional public toilets, and linking to central ventilation system, the exhaust fan will be turned on when the smell become strong enough to be sensed by the sensor. Therefore, the [conventional toilets" can be updated and be free from peculiar smell! Beside the wash basin, citizen only need to put their hands under the container to get liquid soap, so that they don`t need to press it to get secondary pollution. After washing hands, people can take napkins from the intelligent automatic napkin machine which avoids waste. The details of smart public toilet win praises from citizens for the automatic services. In fact, just an pyroelectric sensor added in the conventional public toilets can realize all these visions. A few days ago, Chengdu issued Implementation Opinions on [Toilet Revolution" in Urban and Rural areas to Improve Management Level of Planning and Construction of Public Toilets. In this document, electronic map and modern technologies are introduced in the update and overall arrangement of public toilets to implement [IoT+public toilet plan", which is the key point of [toilet revolution". ISweek recommends following smell sensors, temperature&humidity sensors and solutions for public toilets, which perfectly combines toilet management and intelligent technologies. Air quality sensor TGS2602, capable of measuring ammonia, hydrogen sulfide and VOC generated in the environment Features of air quality sensor TGS2602: * High sensitivity to VOC and gases * Low power consumption * High sensitivity to polluted air * Long service life * Simple application circuit * Small sized Applications of air quality sensor TGS2602: * air freshening control * ventilation control * air quality monitor * VOC dector * smell watchdog DSM501B, TF-LP01, capable of measuring PM2.5. Features of dust sensor module DSM501: * Dust sensor DSM501 being able to sense cigarette smoke, pollen and household dust. * capable of measuring particles smaller than 1 μm. * Small in size, light in weight, and easy to install. * 5V input circuit fitting signal processing. * Internal airflow generator which can automatically draw external air. * Easy maintenance to keep sensor features for a long time. Features of laser PM2.5 sensor TF-LP01: High measurement accuracy Fast response Small size Applications of laser particle sensor/PM2.5 sensor TF-LP01: Air purifiers, portable air quality detecting devices, smart homes. HTG3535CH Humidity and Temperature Sensor Module Main features of analog voltage output temperature&humidity sensing module HTG3535CH: Environment-friendly product Full range interchangeability High reliability and long-term stability Accuracy: +/-3%RH @55%RH Power supply should be within rated voltage Accuracy of temperature measurement through 10Kohm NTC is +/-1% Direct output, output voltage between 1~3.6V when power supply is 5Vdc Capable of measuring humidity between 0~100%RH

SST is a sensor and instrument manufacturer in the UK with over 10 year experience of supplying sensors for industrial applications. They mainly design and produce photoelectric level sensors as well as provide gas sensorsolutions. Their major products are: 1.Small-sized solid optical level sensor, highly reliable and accurate with cost-effectiveness. 2.Robust and reliable zirconia oxygen sensor and analyzer; 3.Oxygen sensor based on fluorescence quenching principle with digital output. 4.Customized CO2 air quality monitors designed for indoor air quality control. 5.Robust temperature and pressure sensors with long service life. The main objective of SST is to provide its customers with sensing and control solutions for their technical and commercial requirements for sensors. They can fulfill their solutions with their standard sensor lines or customized products. ISweek is the authorized sales platform of SST. The technical team of ISweek is consist of experienced engineers who have been trained by the technical director in person. ISweek widely cooperates with clients and recommends suitable sensors for their applications. It also provides comprehensive technical support when needed. If specific solutions are wanted, SST will collaborate with the customer to confirm the ideal technology, build module and customize a solution for the customer. ISweek, with its online supply channel, will supply high quality products including Liquid level sensors, oxygen sensors and instruments from SST to satisfy customer`s demand on purchasing and design. It helps SST to expand their business and promote their brand from every respect. This strategic cooperation between ISweek and SST not only helps engineers and SME to obtain the latest products and solutions from original manufacturers, but also expand the market by building a bridge of communication for the registered users of ISWeek and SST with its online sales platform. SST Company profile Company website: http://www.sstsensing.com Headquarter: Lanarkshire, Coatbridge, Scotland focused field: Technical and application support of gas sensing solutions and liquid sensing solutions

People spend 1/3 of their lives on sleeping. High sleeping quality can eliminate tiredness and help our body and brain to relax and recover. However, with living pace accelerating, people are being haunted with sleeplessness. Air purifier can enhance sleeping quality to a certain extent. Researches have found that people feel more comfortable and sleep better in natural environment, like in rainy nights or hearing the sound of wind, water and birds. Air purifiers not only filter pollutants like PM2.5, formaldehyde, virus and bacteria to create a safe atmosphere, but can also simulate natural environment to some extent and release anion. It can enhance the harmony between people and their dwelling, so as to offer people a good environment to enjoy their sleep. ISweek supplies following types of professional VOC & PM2.5 sensors for air purifiers: Air quality sensor /VOC sensor TGS2600: Air quality sensors TGS2600 are imported from Japan. They have high sensitivity to extremely weak air pollutant (especially cigarette smoke) like CO and H2 in cigarette smoke. This type of air quality sensor is capable of detecting several ppm of H2. With its small size, TGS2600 needs only 42mA for its heater, and adopts standard TO-5 metal packaging. Laser PM2.5 Sensor TF-LP01: TF-LP01 laser particle sensors are small modules that detect dust in the air based on scattering theory. They are of small size, high accuracy, excellent repeatability and consistency. This type of sensor can respond in real-time and implement continuous collection with high interference resistance and ultra silence. All sensors are 100% tested and calibrated when leave factor. DSM010 Pm2.5 Sensor Module PDSM010: PM2.5 sensor PDSM010 is capable of detecting particles of 1μm like cigarette smoke, pollen, microorganism, dust mite and indoor dust. It can measure concentration of floating particles in a room within 30㎥. This sensor is suitable for automatic indoor air monitoring system like air purifiers. Signal of PM2.5 sensor PDSM010 is transferred into PWM output via internal circuit and MCU program. In addition, the filter circuit and MCU program can remove the noise effectively, so that the device can work more stably even when with noise interference. PM2.5 sensor PDSM010 possess dual advantage of stable detection performance and high product efficiency. Different from the former model (DSM), the additional control point (VR Trimmer) is removed from this new type, so as to prevent the potential error caused by users` random modification.

Living in an accelerating pace, people are being haunted with sleeplessness. Sometimes people fail to fall asleep all night long, or awake frequently, then they have to suffer from exhaustion and anxiety in the next day. If insomnia lasts long, people may be infected with neurasthenia and depressive disorder. The causes of insomnia are various, but there is one that is easily neglected–indoor air quality. According to USEPA, 68% of human diseases are caused by air pollution. When people are asleep, their immune system is also inactive, so that virus, bacteria and other harmful matters can easily get into human body and cause diseases. Moreover, a research done by health school of Harvard University found that air pollutant can stimulate central nervous system and lead to upper respiratory infection, which will worsen sleep-disordered breathing, and give rise to apnea and hypoxia. In summer when air pollution is severer, such problems are more apparent. Researches have found that people feel more comfortable and sleep better in natural environment, like in rainy nights or hearing the sound of wind, water and birds. Air purifiers not only filter pollutants like PM2.5, formaldehyde, virus and bacteria to create a safe atmosphere, but can also simulate natural environment to some extent and release anion. It can enhance the harmony between people and their dwelling, so as to offer people a good environment to enjoy their sleep. Shenzhen ISweek supplies following types of professional PM2.5 sensors and formaldehyde sensors for air purifiers: PDSM010 PM2.5 Sensor Module (Korea) PM2.5 sensor PDSM010 is capable of detecting particles of 1μm like cigarette smoke, pollen, microorganism, dust mite and indoor dust. It can measure concentration of floating particles in a room within 30㎥. Figaro laser PM2.5 sensor - TF-LP01 TF-LP01 laser particle sensors are small modules that detect dust in the air based on scattering theory. They are of small size, high accuracy, excellent repeatability and consistency. This type of sensor can respond in real-time and implement continuous collection with high interference resistance and ultra silence. All sensors are 100% tested and calibrated when leave factor.

Home, sweet home. When we are at home, we feel safe, relaxed and beloved. However, due to the worsening air pollution, our homes are being threatened by harmful matters like VOC, haze and PM2.5. Cannot breathe fresh air, we are not as healthy and happy as we used to be before. To solve this problem, air purifiers are developed and introduced to people`s dwellings. They pump fresh and clean air into houses and safeguard people`s health. At present ISweek supply following PM2.5 sensors and VOC sensors which can be applied in air purifiers: PM2.5 sensor TF-LP01: * Detection based on laser principle * High accuracy * Fast response * Wide measurement range: 0~999ug/m3 PM2.5 sensor DSM501B: * PWM output * Detection based on IR principle * Capable of detecting particles larger than 1μm * Inbuilt-heater to enable automatic air suction * Small sized and light-weight * Easy installation PM2.5 sensor PDSM010: * Customizable sensitivity for effective control in different applications * Capable of detecting particles of 1μm * MCU control (factory calibration) * Easy maintenance * PWM output (low logic pulse activation) * Noise resistance VOC sensor TGS2600: * Low power consumption * High sensitivity to polluted air * Long service life and low cost * Simple application circuit * Small in size

"2018 Central Ventilation Industry Conference" was held in Shanghai by Indoor Environment Control and Health Branch of CAEPI recently, during which many participants discussed keenly about the breakthroughs in central ventilation industry. According to a survey done by WHO, morbidity rate of respiratory diseases and flu in China stays at a high level because of environment pollution. This situation draws peoples attention on air quality, so masks, air purifiers and central ventilation system become market hits, which even form a sizeable "air economy". consequently, central ventilation system, after a long while of silence, embraces a brand-new climax. What is central ventilation system? Central ventilation system is a new type of indoor air cleaning facility which exchange air between indoor and outdoor by forced air supply and emission. This open type air circulation system can supply oxygen-enriched air indoors 24h round, and has been popularized since 1970s in Europe and America. For now, the system is also widely applied in commercial residential buildings and household. Functions of a central ventilation system: Ventilate and add oxygen indoors; Filter PM2.5 and resist fog and haze; Eliminate harmful gas indoors for human health; Control indoor temperature and humidity. Use of PM2.5 Sensors in Central Ventilation Systems: The key function of central ventilation system is to filter PM2.5 and haze in the air, so as to purify the air. Based on optical scattering theory, the sensing module monitor and detect the concentration of dust. The PM2.5 sensor has an IRED and a high sensitivity photoelectric receiving sensor inbuilt in it. Dust can reflect the light emitted by IRED, and photoelectric sensor can obtain the concentration of dust based on the strength of reflection. When the concentration gets too high, central ventilation system will start-up its PM2.5 filtering function automatically to purify the air. With the development of economy and enhancement of people's living standard, people are paying more attention on environment problems, especially frequent fog and haze in north China. As the major ingredient of haze, PM2.5 become an important index in air quality report made by environment protection department, PM2.5 detection techniques are thus well researched. Conventional PM 2.5 detectors are often expensive yet hard to use, making it hard to popularize them for household use. Therefore small, portable and convenient environment detectors with PM2.5 sensors inbuilt appear in the market. These detectors are of good performance and can monitor PM2.5 real-time, suitable for home environment and detection characteristics of temperature and humidity. Among these products, ISWeek recommends following PM2.5 sensors: SHARP PM2.5 sensor/dust sensor – GP2Y1010AU0F (Japan) Sharp PM2.5/dust sensor GP2Y1010AU0F is a type of IR dust sensor that can detect particles of 0.8μm, like pollen and cigarette smoke. It is ideal for air purifiers. syhitech dust sensor – DSM501 (Korea) Dust sensor/PM2.5 sensor DSM501 is capable of sensing cigarette smoke, pollen and indoor dust. Its automatic air inlet unit can be heated to adjust its resistance to set measurable size of particles. It works on the same theory of particle calculators to detect the absolute number of particles in unit volume. syhitech PM2.5 sensor – PDSM010 (Koren) PM2.5 sensor PDSM010 is capable of detecting particles of about 1㎛, including indoor dust, pollen, microorganism, dust mites and cigarette smoke. It can measure concentration of floating particles in a room within 30㎥.

Digital printing is to input designed pattern into a computer with digital technology, edit it by CAD, and use a computer-controlled micro-piezo ink nozzle to directly spray the dye liquor onto the textile to form the desired pattern. With technology being gradually improved in recent years, development of digital decoration and mass application of machines have brought a brand-new concept to textile printing and dyeing industry. Unprecedented opportunities are thus coming up. Now, ISWeek would like to share some solutions on full automatic ink supply systems in digital decorating machines. The importance of ink supply for continuity and impermeability in the ink supply system There are four main types of marking ink used by digital textile printers: disperse dyes ink for heat transfer printing, which is used on chemical and blended fabric; active dye ink, which is used on natural fabrics like cotton, sesame and silk; acid dye ink, which is used on fur, silk and spandex; coating dye ink which has low fastness to wet rubbing and narrow color gamut but is widely used on most fabrics. Ink supply system matters on whether ink can be normally printed. For example, whether supply pressure is positive or negative, whether ink can be continuously supplied and whether the tubes in the system are properly sealed. These factors can influence the image quality greatly. Also, the evaporation of ink solvent can lead to printer parameter change, stability lowering and even the orifice can be blocked in bad cases. To detect the level in ink supply system, ink storage box on fixed framework, level sensors and controllers set in the box are required. The storage is set above the ink box, and they are linked with connecting tube, in which there is a solenoid valve. The valve and the sensor are connected to the controller via circuit 1 and circuit 2 respectively. A filter is also connected in the tube which is between the valve and ink storage box. The combination of level control and pressure control solves the influence between each other, making such printer ideal for high-speed printing. Sensors most commonly used in printers are photo-electric type, whose basic working principle is: the sensor transfer the changing light intensity to electric signal, so as to emit controlled light beam aiming at the target. The light beam coming from semiconductor light source, LED, LD and IRED emits uninterruptedly or change the pulse width. The receiver is consist of photodiode, phototriode and photocell. Optical elements like lens or apertures are installed at the front of the receiver. But for level detection of full automatic enclosed ink supply systems in digital decorating machines, ISWeek would like to recommend this Optomax Digital Series Liquid Level Switches: LLC200D3SH. LLC200D3SH is a new contact type of liquid level measuring device based on principle of reflection and refraction. Photo-electric level sensors are of small size, plain structure, high location accuracy, high sensitivity, and no mechanic components. They needs no debugging and low power consumption while being highly resistant against high temperature, pressure and strong corrosion. LLC low price series level sensor provides single-point level detection. An IR emitter and a detector are specially designed for mass OEM customers, while they needs to be precisely positioned to ensure that they can be well optically coupled in the air. When the cone shaped end of the sensor touches the water, IR will transmit out of the conical surface, so light intensity will be weakened when the light reaches the detector. This type of sensors are often applied in level detection in gear cases, transmission cases and pump of engine oil, coolant and refrigerant.

For delicacy management of places with higher requirements on data security, like large-scale data centers, IDC or power distribution cabinets, monitoring temperature and humidity in their computer room only is not enough. In practice, there are cases when every checking point in the machine room shows that temperature and humidity are normal, while operation environment of internal facilities cant be guaranteed. Internal heat dissipation of equipment has become a major source of equipment fault, so temperature and humidity monitoring inside machine rooms and cabinets is urgently required. At present, most machine rooms and their environmental units are 24-hour safeguarded and regularly inspected by staff. With heavier management burden, it can neither shoot troubles in advance nor implement scientific management on time and liability of happened accidents. Therefore, it is necessary to monitor temperature and humidity and add video surveillance in machine room and paths between servers. Here is the recommended structure chart of monitoring system: In relatively larger computer rooms, temperature and humidity differs between each checking points due to airflow and equipment distribution. Amount of sensors to be mounted should be determined by the actual area and locating positions of facilities in the machine room. Real-time onscreen display of temperature and humidity in the machine room can be realized by the interaction between sensors and IPC in main monitoring room. When the measurement value reaches the preset point, the system will make an alarm to warn on-site administrative staff. Moreover, a communication interface for wireless modem can be preserved for further expansion. The card slot for wireless modem preserved on the hardware can be useful in the future when SMS alarm is needed. In this article we recommend a digital temperature and humidity sensor – HTU21D. With its unique design and process, this type of sensors can measure and display ambient RH and temperature within a high accuracy and relatively low cost. HTU21D Digital Relative Humidity and Temperature Sensor DESCRIPTION HTU21D, the new humidity and temperature sensor of MEAS is about to set new standards in terms of size and intelligence: Embedded in a reflow solderable Dual Flat No leads (DFN) package of 3 x 3mm foot print and 1mm height it provides calibrated, linearized signals in digital, I2C format. HTU21D sensors are dedicated humidity and temperature plug and play transducers for OEM applications where reliable and accurate measurements are needed. Direct interface with a micro-controller is made possible with the module humidity and temperature digital outputs. HTU21D sensors are low power consumption designed for high volume and cost sensitive applications with tight space constraints.

Nowadays, gas pipeline projects are extensively implemented in advanced technological industries like industrial gases, petrochemical engineering, medicine, micro-electronics, semi-conductors, solar photovoltaics, laboratories and institutes. Mass flow gas meters are commonly applied in such projects. Centralized pipeline supply of industrial gas is a simple and efficient supply mode. However, due to industrial gas and corrosion of pipe materials, many impurities are generated in the pipeline. If the pipe is used for oxygen transmission, the oxidation of pipe will be accelerated. The accumulation of impurities will lower the quality of industrial gas, and obstruct gas appliances like numerically-controlled machine tool, welding gun, burning torch, leading to equipment errors that affect normal production. According to international standard classifications, selection of flow gauges involves measurement of fluid flow, oil and gas commercial units, medical equipment and valves. But in China, it involves level meter, oil and gas transferring equipment, length measurement, public medical facilities and oil drilling and production equipment. For now the flow gauges applied in our daily lives are mainly for volume measurement. Mass flow meters are of high accuracy, long service life, wide flow range and excellent repeatability. It is an advanced technology in China to use mass flow gas meters for flow measurement. Mass flow gas meters calculate flow based on heat conduction theory. Two thermal resistance elements are in measuring section where the gas goes by, one for temperature measuring, the other as a heater. These two elements, together with the circuit inside the meter, forms a temperature control system to keep the temperature in the space between the two elements at a constant value. The larger the gas flow becomes, the stronger the cooling effect is, so that the current required to keep constant temperature becomes bigger. This heat conduction is proportional to gas mass flow, which means that the relationship between the supply current and gas mass flow can be expressed by a corresponding function. Moreover, if flow is expressed by volume, parameters of the medium (temperature and pressure, etc.) should be given since that the volume of gas can be affected by the changes of temperature and pressure, while mass flow gas meter can avoid such problem. Measurement is the eye of industrial production, in which gas flow measurement relates closely to domestic economy, national defense and science research. It is important for quality control and efficiency of production, especially in the time when energy crisis and industry automation is taking place. For the monitor of industrial gas in gas pipeline, ISWeek provides a solution based on flow meter MF5000 from Siargo. MF5000 series Gas Mass Flow Meters General description MF5000 series mass flow meters are specially designed for small pipe flow monitoring and feature an extremely low pressure loss compared to the traditional by-pass thermal mass flow meters in this application scope. The accuracy of the meters are generally ±(1.5+0.5FS)% or better depending on the requests. The meters can work at an environment of -20 to 60°C and pressure up to 1.5 MPa. Applications include semiconductor gas process monitoring and control, hospital oxygen gas monitoring, etc. MF5000 Series have 5 designs, with model number:MF5003/MF5006/MF5008/MF5012/MF5019. MF5000 series Gas Mass Flow Meters Features and Applications – Highly sensitive, measuring as low as 8 mm/sec, and as high as 65 m/sec with a single assembly – Directly sense mass flow using thermal mass flow principle – Proprietary MEMS sensor package design for better reliability – Standard 12 ~ 24 Vdc power supply – Low pressure loss forreducing energy cost – Industrial standard Modbus protocol for easy networking and remote control MF5000 series Gas Mass Flow Meters Mechanical Dimensions MF5000 series Gas Mass Flow Meters Specifications Accuracy ±(1.5+0.5 FS)% Environment Temperature: -20 ~ +60℃; Humidity: < 95%RH (No icing or condensation) Flow channel 3 ~ 19 mm Display Flow rate and accumulated flow Interface 4 ~ 20 mA; RS485; Pulse Calibration Air @ 20℃; 101.325 kPa Protection IP40 (Without Ex proof model); IP66 (With Ex proof model) Ex Proof Ex d IIC T4 Note:the above parameters are applicable at 20℃ and 101.325 kPa MF5000 series Gas Mass Flow Meters Production selection

Hydrogen chloride (HCl) is a diatomic molecule, consisting of a hydrogen atom H and a chlorine atom Cl connected by a polar covalent bond. It is a colorless gas with pungent smell, which forms white fumes of hydrochloric acid upon contact with atmospheric water vapor. Hydrochloric acid is a solution of hydrogen chloride and water, and a variety of other chemical species, including hydronium and chloride ions. HCl can be used to manufacture chloride like zinc chloride (a kind of welding flux), and extract metals like radium, vanadium, tungsten and manganese. It is an important kind of inorganic chemical material, which is widely used in industries including dye, medicine, food, printing, leather and metallurgy. With the development of organic synthetic industry, the applications of HCl and hydrochloric acid are becoming more extensive. It can be used in starch hydrolization to produce glucose, and also in manufacturing quinine hydrochloride (against malaria) and other kinds of hydrochloride used in organic potions. During production, various reasons may lead to HCl leakage which is poisonous to staff. Therefore, HCl concentration needs to be monitored in real time in case leakage takes place. HCl, when reach a certain level, can influence human body as follows: HCl concentration Influence on human body 1ppm Can be smelled 2.5ppm Harmful 9ppm physiological barrier appears, but can stand for 6 hours 10ppm The smell become pungent 35ppm Start to sneeze and become apnea 10-50ppm Can still work but not for long 40-90ppm Can stand for 0.5-1 hour 1000-1350ppm Be critically ill in one hour 1250-1750ppm Die in one hour The highest level allowed by national profession regulations is 5ppm. We ISWeek provide HCl gas sensors for real-time monitoring of HCl concentration in working environment. Features of HCl sensor HCL-A1: Electrochemical principle Φ20mm*16.5mm in size Measurement range: 0~100ppm Linear output Capable of resisting the interference of SO2, CO, H2, C2H4, NH3 and CO2 Features of HCl sensor HCL-B1: Electrochemical principle Φ32.3mm*13.5mm in size Measurement range: 0~100ppm Linear output Capable of resisting the interference of SO2, CO, H2, C2H4, NH3 and CO2

Before talking about PM2.5, let`s have a look at the concept of PM10. In the air we are breathing every moment, there are plenty of particle matters which are named as Total Suspended Particulate(TSP). TSP is a major component of air pollutants, the ones of which with their diameter below 10 μm are termed as PM10, or inhalable particles. Inhalable particles, with negative effects to human health and atmospheric visibility, mainly come from pollen and dust blown by wind. After getting the concept of PM10, it becomes easy to comprehend that of PM2.5. PM2.5, or say repairable particle, similarly means the particles smaller than 2.5μm. Their main source is combustion of fossil fuel like vehicle exhaust, fire coal and VOCs. PM2.5 is much more harmful than PM10 . Researches show that comparing with PM10, PM2.5 contains larger amount of poisonous and harmful substances, stays longer and goes further, so it has stronger influence on human body and air quality. What`s worse, particles over 2.5μm can be blocked by nose and respiratory mucosa, and be eliminated from the body. But PM2.5, with its tiny diameter equaling to 1/20 of hair, can directly go through human organs and reaching the lung, leading to diseases like asthma, bronchitis and CVD. In order to avoid the harms of pm2.5 and protect our health, we can take the following actions: (1) Wear PM2.5 mask. Mask made of cleancool can not only prevent dust and PM2.5, but also eliminate [super-bacteria" that can survive from antibiotics. When breathing, especially in crowded conditions like subway stations, people are inhaling plenty of PM2.5 which poses risk to human health. A mask can effectively solve this problem. (2) Do not smoke or smoke as few as possible. There are lots of PM2.5 in cigarette smog which can hazard human body directly or indirectly. If you cannot stop people from smoking ,then try to keep away from the smog he produce. (3) Do not do morning exercise in foggy days. It is mainly PM2.5 that forms the fog, so you may breathe more PM2.5 if you do sports in foggy weather. A proper mask is needed in such weather, and tough activities should be avoided. Here we ISWeek would like to recommend several sensors for smart homes to detect PM2.5 and PM10. Features of civil used PM2.5 sensor PDSM010: * Customized sensitivity for effective control in applications * Capable of detecting 1μm particles * MCU control (factory calibrated) * Simple maintenance * PWM output (low logic pulse activation) * Noise resistance Features of civil used PM2.5 sensor TF-LP01: * High accuracy * Fast response * Tiny size

What is an ultrasonic sensor? An ultrasonic sensor uses a transducer to send and receive ultrasonic pulses. These pulses relay proximity information of relevant matters, so that the sensor can output its distance to the matter. How do ultrasonic sensors work? Ultrasonic sensors transfer ultrasonic signals to other energy signal (usually electric signal). Ultrasonic wave is a kind of mechanical wave with its vibration frequency higher than 20kHz. Why use an ultrasonic sensor? Ultrasound is reliable in any lighting environment and can be used inside or outside. Ultrasonic sensors can handle collision avoidance for a robot, and being moved often, as long as it isn`t too fast. Ultrasonics are so widely used, they can be reliably implemented in grain bin sensing applications, water level sensing, drone applications and sensing cars at your local drive-thru restaurant or bank. Ultrasonic rangefinders are commonly used as devices to detect a collision. Ultrasonic sensors are best used in the non-contact detection of: Presence Level Position Distance Applications Involving Ultrasonic Detection Ultrasonic Distance Measurement Ex. Distance measurement would be applied in a garage parking application, sensing when a vehicle is pulled completely into a garage. Ultrasonic Sensors for water level detection Tank level measurement, Fuel gauging, irrigation control. Ultrasonic Obstacle Detection Our UAV Sensors for Drones as well as our proximity sensors that are used for robots are for obstacle detection.

Sunlight is a vital element for creature living. People have found that sunshine is beneficial for health since ancient times, Middle eastern ethnicity found that the ultraviolet light helps to cure skin diseases. In modern times, people see sunbathe as a physical fitness activity. Sunlight is consist of UⅥA, UVB and UVC, etc. UVB mainly causes sunburn; UVA leads to skin tanning, while UVC seldom reaches the ground as it is blocked by clouds. In 1970s, scientists have developed many UV medical instruments, which were known as PUVIA. This therapy required patients to take photosensitizer before UV exposure, yet its side effect was that patients had to be away from light, and skin reaction was fierce. In 21 century, the research and application of photomedicine has become a globally concerned medical topic. Principle of UV therapies have been partly discovered in modern medicine. As photo -biology effects of UV firstly works on human skin or mucous membrane, UV therapy has special value in treatment of various skin diseases. The Concept of UV and its Classification: The sun is the only natural source of ultraviolet ray. Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light. UV between 200-400mm which is applied in photobiology ad medical domain can be divided into following ranges: long-wave, or say UVA/UV-A, is between 320-400mm. It can be subdivided into two wavebands, UVA1 and UVA2, with a dividing line of 340mm. UVA1 is able to strengthen cellular immunity, which can restrain untimely apoptosis caused by UVB. UV of different wavelength has different biological effects and penetrability toward skins. Generally speaking, the longer the wavelength is, the stronger its penetrability goes, vice-versa. Short-wave UV is relatively destructive, yet it can hardly reach the ground as it is mostly blocked by the air, clouds, dust and moisture in the atmosphere, leaving little harm to human body. Short-wave UV applied in medical realm is mainly artificial and used for sterilization. Medium-wave UV is the most active part and is mainly absorbed by cuticle. Long-wave UV is of the strongest penetration, allowing it to reach dermis and work on blood vessel or other organizations. But it only influence the skin when some certain light-sensitive matters exists. UV phototherapy is the most advanced skin treatment method by now. It is a physiotherapy that adopts narrow-band medium wave UV below 311nm. UV light reveals its effectiveness in drying, sterilization and anti-inflammation, while it can also help in accelerating blood circulation, easing pain and epithelial regeneration. Therefore, with harmful waveband filtered, UV makes a favorable effect on treatments against herpes virus, bacterial infection and leucoderma. Here we ISWeek would like to recommend two leading types of exported UV sensors for skin treatments. UVB sensor GUVB-T11GD-L is featured with Good Visible Blindness and high sensitivity, with its peak response at waveband of 300nm. Packaged with TO-46 metal housing and featured with large area of light-sensitive chip, the sensor is usually used for measurement and control of UV intensity in applications including outdoor UV detection, UV disinfection, UV curing, UV flame detector, UVB monitoring and skin care. UV sensor GUVA-S12SD is SMT packaged (SMD3528), allowing them to be adopted in small-sized devices. Its output current is proportional to illumination intensity and of high coherence. The sensor, which has a specific spectral response, mainly measures UV in sunlight and intensity of UVA lamps. It is especially suitable for UVI detection which is typically applied in medical used UV detection.

Liquid Level sensors are playing essential roles in pharmaceutical industry, for that level monitoring directly influences the quality of medical products, and even determines whether the production can go smoothly. Meanwhile, as an important measurement, level detection is one of safeguard elements in production processes. Qualified level detection devices featured with rigid measurement technology can help guarantee the quality of raw materials, semi-finished products and end products. Therefore level sensing technology needs to be scientifically selected to ensure the reliability and stability of test result, so as to ensure the uniformity of product quality. Liquid level, being measured for many kind of uses, means the height the liquid reaches in a jar or tank. Liquid level measurement is mainly divided into two types: level announciator and continuous level detection. Liquid level announciator is often to measure several fixed points and make alarm when liquid level touches the upper or lower limit. Continuous level detection means to measure liquid level continuously. Such measurement is often applied in petrochemical engineering, food processing and pharmaceutical industry, etc. Frequently used liquid level measurement technologies include methods based on pressure, buoyancy, electric, ultrasonic, radar and Tuning Fork Vibration, etc. Applications in pharmaceutical enterprises usually involve strong corrosive like acid or base materials, and thus the liquid level detection of their storage tank and sink should avoid contact type meters. In current, some pharmaceutical companies which have automated their production process use photoelectric level sensors to control liquid level. The operation of photoelectric level sensor bases on electric-conductivity of a certain kind of liquid. Once liquid touches the corresponding electrode stick, a switch signal is generated, and then the signal is processed to control liquid level. The level switch is of very simple structure, and suitable for conditions that have no requirements for continuous measurement. In order to reduce the cost, enhance efficiency and ensure production safety, real-time monitoring, automated control and dispatching management are required during production processes. Therefore ISweek supplies SST Liquid Level Sensor/switch LLC200D3SH and its relevant solutions for these requirements. Photoelectric liquid level switches are featured with single point level detection and TTL compatible push-pull output. The sensor is designed with an IR emitter and a detector. It needs to be installed at specific position to attain a good optical coupling. When the cone top of the sensor contact any liquid, IR will transmit through the top, so the light intensity reaching the detector is weakened. The LLC series sensors (industrial type and photoelectric water immersion sensor) can operate normally in tough environment and a wide range of supply voltage, making them suitable for heavy-loading industrial applications. With its driving current of 250mA, the sensor can directly drive the alarm and other devices. Electrical features of photoelectric liquid level sensor / switch LLC200D3SH (industrial grade): Supply voltage( Vs) 4.5 Vdc to +15.4Vdc Supply current( Is) Maximum 2.5mA (Vs = 15.4Vdc) Output Part No. D3 followed by L means the sensor output low level in the air; others are of high level Output sink current and source current (Iout) 100mA Operating temperature range -25°C to +80°C(standard type) -40°C to +125°C(extended type) Storage temperature -30°C to +85°C (standard type) -40°C to +125°C (extended type) Output voltage( Vout) Iout = 100mA output high Vout = Vs – 1V max output low Vout = 0V + 0.5V max Output voltage ( Vout) Iout = 0mA output high Vout = Vs – 0.3V Max output low Vout = 0V + 0.1V Max

Solar hydrogen production systems include photolysis, solar power generation and water splitting hydrogen production. The technology of generating hydrogen with solar energy was developed in recent 30~40 years. By now, researches on solar hydrogen production are focused on following sorts of technologies: thermochemistry, electro-chemical water splitting, photocatalysis, artificial photosynthesis and biological hydrogen production. Herein introduces hydrogen generation with photocatalysis. Photocatalystic hydrogen generation Some materials can be applied as catalyst to split water and generate hydrogen with a certain light condition, such as semiconductor like TiO2, transition metal oxides, laminated metal like K4Nb6O17, K2La2TiO10, Sr2Ta2O7.etc, and catalytic materials that can utilize visible light, like CdS and Cu-ZnS, etc. However, the efficiency of photocatalytic water splitting is as low as 1%~2% so far. Existing studies on photocatalytic water splitting include semiconductor system and metal complex system, among which studies on the former have gone further. The principle applied by semi-conductive photocatalytic is similar to that of electro-chemical cell. Tiny photosemiconductive particles can be seen as microelectrodes suspending in the water. They work like the photo-anode, while they are not separated from each other like electro-chemical cells. Even the cathode is supposed to be on the same particles, and the water splitting reactions of generating hydrogen and oxygen take place at the same time. When UV less than 387 nm radiates on TiO2, electrons on valence band absorbs the energy and transit to conduction band, producing holes and electrons on valence band and conduction band. Hydrone absorbing on TiO2 are oxidized by holes of strong oxidizability and turn into oxygen, while hydrogen ion are migrated in electrolyte solution and are reduced into hydrogen. Compared to electro-chemical cell, semiconductor photocatalysis sharply simplifies the water splitting reaction, but optical excited electron hole pair on the same semiconductor particles are extremely easy to be recombined. Therefore, in order to restrain the counter-reaction of hydrogen and oxygen, as well as the recombination of electron and hole caused by optical excited semiconductor, electron donor can be added as hole scavenger to enhance efficiency of hydrogen production. Since that numerous organic matters in waste water are favorable electron donors, waste water treatment and photocatalytic hydrogen generation can be combined to implement solar hydrogen production and solar decontamination simultaneously. Hydrogen concentration needs to be measured in real time during the generation process. For photocatalysis method, the concentration should be controlled within 20~40%. We ISWeek can supply thermal conductive gas sensor MTCS2601. The features of this product are as follows: Based on thermal conductance principle Capable of measuring low vacuum. Silicon equipment sealed in SMD ceramic packaging. Super-small size of 7*5mm Low power consumption and fast response Excellent sensitivity in the pressure range between 0.01~100mbar. Pressure range can be extended to 0.0001~1bar Hydrogen concentration measurement between 0~100% available.