Classification of sensors for gas detectors
Gas sensors are a major category of chemical sensors. From the working principle, characteristic analysis to measurement technology, from the materials used to the manufacturing process, from the detection object to the application field, they can form independent classification standards, and derive a variety of classification systems, especially on the issue of classification standards. Not yet unified, it is quite difficult to carry out a strict systematic classification.
1. Divided according to the nature of the gas to be tested
According to the nature of the gas to be detected, it can be divided into: sensors for detecting flammable and explosive gases, such as hydrogen, carbon monoxide, gas, gasoline volatile gas, etc.; sensors for detecting toxic gases, such as chlorine, hydrogen sulfide, arsine, etc.;
2. Divided by application field
According to the application field, it can be divided into: sensors for detecting industrial process gases, such as oxygen in steelmaking furnaces and carbon dioxide in heat treatment furnaces; sensors for detecting air pollution, such as NOx, CH4, O3 that form acid rain; Sensors that detect household pollution such as formaldehyde, etc.
3. According to the structure of the gas sensor
According to the structure of the gas sensor, it can be divided into two types: dry type and wet type.
4. According to the output of the sensor
According to the output of the sensor, it can be divided into two types: resistive and non-resistive.
5. Divided by detection principle
According to the detection principle, it can be divided into: electrochemical method, electrical method, optical method and chemical method.
The research on gas sensors involves a wide range of areas and is difficult, and is a multidisciplinary research content. Everyone has a clear understanding of the concept, characteristics and classification standards of gas sensors. Only by fully understanding the equipment can the equipment be used better for me and maximize its value.
