Methane gas detector are really necessary. With the development of highway and railway transportation networks.The problem of tunnel excavation must be encountered in the construction of these networks. With the phenomenon of tunnel gas poisoning, we have to consider the necessity of installing tunnel gas detector.
What gases are produced in the tunnels?
Tunnel and pipe gallery construction will inevitably produce some toxic and harmful gases. It have always been one of the important hazard sources in the construction process. The toxic and harmful gases in the tunnel mainly include methane. carbon monoxide, hydrogen sulfide, carbon dioxide. and trace nitrogen oxide and VOC gases.
According to their physical and chemical properties. these gases can be divided into combustible gases and toxic gases. The flammable gas in the tunnel is mainly methane (CH4) and some volatile organic gases (VOC). The main harm is that the gas concentration exceeds the standard and the open fire will cause security risks. which will cause huge losses to property and personnel.
The toxic gas in the tunnel mainly harms the human body function and affects the safety of human life. The main irritant gas such as chlorine, phosgene, sulfur dioxide, nitrogen oxide, ammonia and so on. It is characterized by strong irritation to the skin and mucous membrane, some of which are also corrosive. Asphyxia gas carbon monoxide, carbon dioxide, nitrogen and so on. these gases have no obvious toxic to human function, but will cause cell hypoxia, hypoxic asphyxia.
How to choose a tunnel gas detector?
Through the above content. we found that the toxic and harmful gases in the tunnel.have a very big impact on human body or property. It is very necessary to install tunnel gas detector.
- Determine the types of toxic and harmful gases in the tunnel
According to historical experience and geographical environment, the most gases in the tunnel are carbon monoxide, methane and hydrogen sulfide. These gases are both toxic gases, and flammable and explosive gases, it is easy for us to confirm the type of gas detector-methane detector.
- Select a tunnel gas detector
The fixed gas detector is generally selected for tunnel detection. Methane is a combustible gas, which is mainly used to detect the explosiveness of methane. The methane detector in LEL can be selected. There is also a toxic gas detector.carbon monoxide detector.hydrogen sulfide detector.this kind of detector is to detect toxic gas concentration exceeds the standard of human body harm. Also, choose an oxygen detector to make sure the oxygen concentration in the tunnel is too low or too high.
JXCT independently developed gas host + probe to detect gas concentration, can be connected to the host computer software and LED large screen display.
The 485 series bus bus gas detection and alarm system. adopts non-standard protocol or MODBUS protocol for data collection and transmission. The intelligent transmitter node collects and detects the gas concentration in the field, and the. host rotates and detects each node. With intelligent background software, the real-time monitoring. of the gas concentration changes in the field. The bus mechanism, strong anti-interference ability, convenient layout, simple wiring, at the same time the intelligent transmitter node also provides a control of external equipment (exhaust fan, solenoid valve, etc.) switch output. The detector detects gas concentration by natural. diffusion and adopts imported sensors, with good sensitivity and excellent repeatability; The instrument uses embedded micro control technology, high reliability.
The shell of the detector is made of cast aluminum. material with high strength, temperature resistance and corrosion resistance. This product is applicable to detect the concentration of toxic and harmful.flammable and explosive gases in the ambient air. Widely used in metallurgy, power plants, chemical industry, mines. Tunnels, tunnels, underground pipelines and other places, effectively prevent the occurrence of accidents.