About the types of Gas sensors
Background
A gas detector is an instrument for detecting the concentration of gas leakage, including portable or handheld gas detectors, fixed gas detectors, online gas detectors, etc. The detector mainly uses gas sensors to detect the types of gases existing in the environment. Gas sensors are sensors used to detect gas components and concentrations.
Portable Gas Detector vs. Fixed Gas Detector
Handheld Gas Leak Detector Pump Type Portable or Handheld Gas Detectors are one of the more portable gas detectors. The portable gas detector has the characteristics of convenient operation and small size, and is mainly used to detect toxic and harmful substances in the working space. Portable gas detectors can be divided into single-gas detectors and multi-gas detectors. A single gas detector is an instrument that can continuously and quickly detect the concentration of a specific gas in a space. The instrument has the characteristics of fast response, high measurement accuracy and good stability. Portable multi-gas detector can detect multiple gas concentrations. Common multi-gas detectors are 4 gas detectors, which detect combustible gases, oxygen, carbon monoxide and hydrogen sulfide respectively.
Fixed or online gas detectors, that is, gas alarms, generally consist of two parts: a gas alarm host and a gas detection unit. The host computer is connected with the detector through wireless or wired methods to realize the detection of various gas concentrations. The main engine is equipped with sound and light alarm lights, once abnormality is found, it will send out sound and light alarm.
Working principle
The core technology of gas detector is sensor technology. Common gas sensors include electrochemical type, semiconductor type, ionization type, catalytic combustion type, infrared point type, etc. Sensors with different principles can form alarm detection devices of different types, different uses, and different gas detection purposes. How a gas leak detector works also depends on the type of sensor it uses.
Application Introduction
The gas detector can detect various gases such as hydrogen sulfide, carbon monoxide, oxygen, sulfur dioxide, phosphine, ammonia, nitrogen dioxide, hydrogen cyanide, chlorine, chlorine dioxide, ozone and combustible gases. Widely used in petrochemical and coal, metallurgy, chemical industry, municipal gas, environmental monitoring and other places. It can also meet the measurement needs of special occasions, and can be used for gas concentration detection or leak detection in tunnels, pipelines, storage tanks, confined spaces, etc.
