The use of gas detectors in various environments
Recently, frequent dangerous gas incidents in various places have attracted widespread attention from all parties, especially the 12.4 major accident in Chongqing Yongchuan Coal Mine, which has once again brought "dangerous gas detection" into people's field of vision. my country has always imposed strict requirements on the detection of hazardous gases in the workplace. However, due to the different emphasis of enterprises and economic conditions, there are still a large number of environmental risks that are out of control.
In order to ensure the personal safety of factory employees and save costs, the company can equip employees with multi-functional gas detectors, which can be carried with them for personal gas detection or placed in areas with gas hazards for regional detection. The sound and light alarm that comes with the gas detector automatically alarms to remind in time to ensure the safety of employees.
The principle and classification of gas detector
A gas detector is an instrument that can detect the composition and concentration of various gases in the environment. At present, there are many brands of gas detectors on the market, and the categories are complicated. When choosing a gas detector, the company should make more comparisons and choose the gas that suits it. Detectors, gas detectors are mainly divided into portable gas detectors and fixed gas detectors. The core technology of gas detectors is sensor technology. According to different gas sensor detection technologies, the classification of gas detectors is also different.
Gas sensors can be divided into four categories in principle:
(1) Electrical gas sensors, which use the electrical parameters of the material to change with the change of gas concentration, are divided into: resistive and non-resistive. Resistive gas sensors mainly include contact combustion, thermal conductivity, and semiconductor gas sensors ( Also known as metal oxide semiconductor gas sensors and organic semiconductor gas sensors), etc., non-resistive gas sensors usually use the current or voltage of the material to change with the gas content.
(2) Optical gas sensors, which use the optical characteristics of gases to detect gas components and concentrations, are further divided into: infrared absorption type, visible light absorption photometry type, optical interference type, chemiluminescence type and test paper photoelectricity type, photoionization type Wait.
(3) Electrochemical gas sensors utilize electrochemical properties.
(4) Gas sensors made of polymer gas-sensing materials are made of polymer gas-sensing materials, and are further divided into: polymer resistive type, polymer dielectric type, concentration battery type, surface acoustic wave type, quartz oscillator type, etc.
Commonly used gas detectors
Multifunctional gas detector is a kind of gas detector, which is widely used because it can detect multiple gases at the same time.
As the name implies, the multifunctional gas detector is an instrument used to detect the content of one or more gases in the environment. The detector uses natural diffusion to detect gas, and uses electrochemical and combustion gas sensors. It has excellent sensitivity and excellent performance. Repeatability, the multi-function gas detector can detect four gases: oxygen, combustible gas, carbon monoxide and hydrogen sulfide, and can store up to 130,000 pieces of detection data. With software, you can view historical data at any time.
