Before entering a confined space (such as storage tanks, sewers, septic tanks, agricultural grain storage silos, tunnels, etc.), personnel must conduct hazardous gas concentration testing in the working environment before entering. Here, we need to use a gas detector to solve it. The gas detector is also called a gas alarm. It uses a gas sensor to detect the type, composition and content of gas in the environment.

1. It has a built-in pumping function, so that it can be detected in non-contact and divided parts. The gas distribution and gas types in different parts (upper, middle and lower) of the enclosed space are very different. For example: in general, combustible gases are lighter in weight, most of them are distributed in the upper part of the enclosed space; carbon monoxide and air have the same specific gravity, generally distributed in the middle of the enclosed space; and heavier gases such as hydrogen sulfide exist in the enclosed space The lower part.

2. The function of detecting the concentration of multiple gases at the same time to detect dangerous gases distributed in different spaces, including inorganic gases and organic gases;

3. Can monitor the oxygen concentration function to prevent hypoxia or oxygen enrichment;

4. The appearance of the gas detector must be small, convenient for operation and reading, and does not affect the normal work of workers

Portable composite gas detector, also known as multi-gas detector, is the best choice for our type of sealed air detector. This detector can be equipped with multiple gas (inorganic / organic) detection sensors required on a host computer, and at the same time it has the characteristics of small size, light weight, fast response, and simultaneous multi-gas concentration display. More importantly, the price of the pumped composite gas detector is cheaper than that of multiple single diffusion gas detectors, and it is also more convenient to use.

But Shandong China Coal Group needs to remind everyone that when choosing a portable gas detector, it is best to choose an instrument that has the function of individually switching each sensor to prevent the use of other sensors due to damage to one sensor. At the same time, in order to avoid the blockage of the suction pump due to water intake, the safety factor of the instrument with the intelligent pump design with a pump stop alarm will be higher.