Answers to Various Questions About 4-in-1 Gas Detectors
What types of gases can be detected by a four in one gas detector?
Optional and continuous monitoring of 1-4 gases: combustible gas, oxygen, carbon monoxide, and hydrogen sulfide
Why do four in one gas detectors need to be equipped with combustible gases, oxygen, carbon monoxide, and hydrogen sulfide?
Because these four gases have a wide range of applications Before entering confined spaces such as reaction tanks, storage tanks or containers, sewers or other underground pipelines, railway tankers, shipping cargo holds, tunnels, etc., personnel must undergo on-site gas testing, and the testing must be conducted outside the confined space. At this point, it is necessary to choose multiple gas detectors with built-in pumps.
Because there are significant differences in gas distribution and types in different parts (upper, middle, and lower) of a confined space.
Generally speaking, combustible gases have a lighter density and are mostly distributed in the upper part of enclosed spaces; Carbon monoxide has a similar specific gravity to air and is generally distributed in the middle of enclosed spaces; Heavier gases such as hydrogen sulfide exist in the lower part of enclosed spaces. Meanwhile, oxygen concentration is also one of the types that must be detected.
What do the units on the four in one gas detection dashboard mean?
It depends on what gas is being measured, as gases of different properties are measured differently, such as toxic gases, which require high accuracy. Generally, ppm is used, which refers to the number of molecules of a gas per million molecules. In some cases, higher precision is required, so choosing bpm is the number of molecules of the gas contained in each billion gas molecules. Oxygen is generally measured in volume percent vol units, while combustible gases use the concept of lower explosive limit. lel, For example, 30% LEL means that the current concentration is 30% of the concentration that would explode.
Where will the four in one gas detector be used?
It is suitable for explosion-proof and toxic gas leakage, underground pipelines or mines, agriculture, chemical industry, construction, power, fire protection, natural gas, general industry, toxic materials, steel industry, petroleum and petrochemical industry, sewage treatment and other places. Generally, any place that produces toxic gas is acceptable, haha
What does the "ex" on the trademark of the four in one gas detector mean?
If there is an Ex label on the shell or packaging, it does represent explosion protection. But if it is displayed on the screen, it means combustible gas, that is, flammable and explosive gas, and correspondingly, there is usually a% LEL lower explosive limit percentage as the measurement unit. The conventional four in one gas detector refers to H2S, hydrogen sulfide, CO, carbon monoxide, O2, oxygen, EX combustible gas
