The flammable gas detector uses the latest generation of low-power, high-interference-resistant carrier-catalyzed sensors. It forms a detection bridge with two fixed resistors. When the air contains flammable gas diffusing onto the surface of the detecting sensor, the flameless combustion is rapidly performed under the action of the catalyst on the surface of the sensor, and the reaction heat is generated to increase the resistance of the platinum wire of the sensor, and the detection bridge outputs a differential pressure signal. The magnitude of this voltage signal is proportional to the concentration of flammable gas. After being amplified, it performs voltage and current conversion and converts the percentage (% LEL) within the lower limit of the flammable gas explosion into a 4-20 mA standard signal output.
The oxygen detector uses the principle of galvanic galvanic cells, which is constructed by argon (lead) and cathode (silver) in the galvanic cell, separated from the outside by a film, when oxygen-containing gas in the air passes through the film to the cathode. , a redox reaction occurs. The sensor will now have an mV-level voltage output proportional to the oxygen concentration. After the voltage signal is amplified, the voltage and current are converted and the percentage of oxygen (0 to 30%) is converted into a 4-20 mA standard signal output. .
The toxic and harmful gas detector adopts the world's advanced imported electrochemical sensor, which uses the principle of controlled potential electrolysis. Its structure is to place three electrodes in the electrolytic cell, namely the working electrode, the counter electrode and the reference electrode, and apply it to a certain extent. The polarization voltage, the sensor of different gases can be changed and the polarization voltage value can be changed to measure different toxic and harmful gases. The measured gas passes through the film to reach the working electrode, and a redox reaction occurs. The sensor will have a small current output at this time. This current is proportional to the concentration of the toxic and harmful gas. This current signal is converted into a voltage after sampling, and the voltage signal is amplified. After that, the voltage and current are converted, and the content (ppm value) in the detection range of the toxic and harmful gas is converted into a standard signal output of 4 to 20 mA.
The organic volatiles use the world's top photoion gas sensor (PID), which uses the principle of photoionized ionized gas for gas detection. Specifically, the target gas is irradiated/bombarded by the ultraviolet light generated by the ion lamp, and the target gas is ionized after absorbing sufficient violet light energy, and the target can be detected by detecting a small current generated after the gas ionization. The concentration of the gas.
The carbon dioxide detector uses the world's most advanced infrared principle sensor, which is a sensor that uses the physical properties of infrared light to measure, including optical systems, detection components and photodetection components. The optical system can be divided into two types, transmissive and reflective, depending on the structure. The detecting elements can be classified into a thermal detecting element and a photoelectric detecting element according to the working principle. The most widely used thermal sensor is the thermistor. When the thermistor is exposed to infrared radiation, the temperature rises, the resistance changes, and the electrical signal is output through the conversion circuit.
Beijing Jiuzhou Space Science & Trade Co., Ltd. specializes in selling online groundwater monitors, online dust noise automatic monitors, tubular soil moisture temperature monitors/multi-layer soil monitoring systems, mobile automatic runoff observation systems, online soil erosion monitors, dumpers automatically Flowmeter/community tipping flowmeter, small diameter flow sediment automatic monitor, steel ruler water level gauge, automatic rainfall station, portable flow meter, portable weather station, soil nutrient speedometer, gas sampling cylinder, lubricating oil three-stage filter barrel, etc. product
European Style Sofa,European Style Sofa Set,European Style Sleeper Sofa,European Style Leather Sofa
Foshan Haoyu Furniture Factory , https://www.hyluxuryfurniture.com