Principle and Application of Gas Sensors

The so-called gas sensor is used to detect whether a certain area in the presence of a specific gas and / or capable of continuous measurement of gas component concentration of the instrument. In the coal mine , petroleum, chemical , municipal , medical , transportation , family and other security aspects , commonly used in the detection of combustible gas sensor , combustible , toxic gases or existence , or oxygen consumption and so on. In the electric power industry and other manufacturing fields, but also quantitative measurement of flue gas sensor used in the concentration of each component to determine the combustion of harmful gas emissions and the like. Field of environmental monitoring in the atmosphere , the use ofCrankshaft Position Sensor determine environmental pollution situation , it is very common. Classification of gas sensors from detecting the type of gas , the often divided into combustible gas sensor ( often using catalytic combustion , infrared, thermal conductivity , semiconductor type ) , toxic gas sensors ( generally using electrochemical , metal-semiconductor , photoionization , flame ionization type ), hazardous gas sensor ( often with infrared , ultraviolet , etc. ) , oxygen ( often using paramagnetic , zirconia ) and other Engine Coolant Temperature Sensor ; from the use of the instrument , into the portable and stationary ; obtained from the gas the way the sample is divided into diffuse ( i.e. sensor mounted directly on the object to be measured environment , the measured gas through natural diffusion in direct contact with Car Temperature Sensor element ) , suction ( suction pump is through the use of other means , to be tested gas is introduced into the sensor sensing element detection. based on the measured gas is diluted , can be subdivided into full suction and dilution type, etc. ) ; from the analysis of gaseous components , and is divided into a single formula ( only for specific gas detection ) and compound of formula ( composition for simultaneous detection of multiple gases ) ; press Sensor detection principle , be divided into thermal , electrochemical , magnetic , optical , semiconductor type , such as gas chromatography type .