What are the types of sensors for nitrogen oxide detectors?
Nitrogen oxides, mainly nitric oxide and nitrogen dioxide, are important reasons for the formation of photochemical smog and acid rain. The toxic smoke formed by the reaction between nitrogen oxides in car exhaust and ultraviolet radiation is called photochemical smoke.
Photochemical smoke has a special odor that stimulates the eyes, harms plants, and can reduce atmospheric visibility. It is a harmful gas to the human body and plants. Therefore, it is necessary to use a nitrogen oxide detector to effectively monitor the emission of nitrogen oxides, thereby reducing the occurrence of accidents.
The key part of a nitrogen oxide gas detector is the gas sensor. The gas sensors of nitrogen oxide detectors can be divided into three categories in principle:
Gas sensors utilizing physical and chemical properties, such as semiconductor type (surface controlled, volume controlled, surface potential type), catalytic combustion type, solid thermal conductivity type, etc.
Gas sensors utilizing physical properties, such as thermal conductivity, optical interference, infrared absorption, etc.
Gas sensors utilizing electrochemical properties, such as constant potential electrolysis, Gavanni battery, membrane ion electrode, fixed electrolyte, etc.
More and more water pollution incidents are stimulating people's nerves. Therefore, it is necessary to use a nitrogen oxide detector to effectively monitor nitrogen oxide emissions, reduce harm to the human body, and thus reduce accidents.
