Three major types of gases that gas detectors often need to detect
The gas types that gas detectors often need to detect are mainly divided into three categories: combustible gases, toxic gases and VOC (volatile organic compounds).
Combustible gas is often encountered in use. The concept of combustible gas means that it can be uniformly mixed with air (or oxygen) within a certain concentration range to form a premixed gas. It will explode when it encounters a fire source, and a large amount of gas will be released during the combustion process. energy gas.
Such gases are ubiquitous in the working environment of petrochemical and chemical manufacturing industries. Our common combustible gases are hydrogen (H2), methane (CH4), ethane (C2H6), propane (C3H8), butane ( C4H10), ethylene (C2H4), propylene (C3H6), butene (C4H8), acetylene (C2H2), propyne (C3H4), butyne (C4H6), etc.
Toxic gas is a gas that is harmful to the human body and can cause poisoning. It is mainly divided into irritating gas (gas that irritates the eyes and respiratory tract mucous membrane) and suffocating gas (gas that can cause hypoxia in the body). Toxic gas asphyxiating gas can be divided into simple asphyxiating gas, blood asphyxiating gas and cell asphyxiating gas), these gases can directly cause harm to the human body, and are also very dangerous, common toxic gases carbon monoxide (CO), hydrogen sulfide (H2S), ammonia (NH3), chlorine (CL2), sulfur dioxide (SO2), nitrogen dioxide (NO2), nitric oxide (NO), carbon dioxide (CO2), etc.
The concept of VOC is any organic liquid or solid that can volatilize spontaneously under normal temperature and pressure, usually called organic solvents. Common detectors can detect gasoline, diesel, benzene, crude oil, paint, etc.
Confirm the type and concentration range of the gas to be detected:
The types of gases encountered in each production department are different. When choosing, we must consider all possible situations. For example, in the mining environment of coal mines, methane and less toxic alkanes are mostly, so it is undoubtedly more appropriate to choose a combustible gas detector. This is not only because the detection principle of the combustible gas detector is simple and widely used, but also it has the characteristics of convenient maintenance and calibration. If there are toxic gases such as carbon monoxide and hydrogen sulfide, it is necessary to choose a gas detector that detects combustible gas, carbon monoxide, hydrogen sulfide, and oxygen at the same time to ensure the safety of workers.
