What problems may be encountered during the use of gas detectors?
Gas detector is an instrument tool for detecting gas leakage concentration, mainly referring to portable and fixed gas detectors. Mainly using gas sensors to detect the types of gases present in the environment, gas sensors are sensors used to detect the composition and content of gases.
1, What gases are included in the standard four in one configuration?
Some people are not quite sure about the standard four in one gas and gas detection range commonly mentioned. Simply put, the standard four in one gas is combustible (methane) 0-100% LEL, carbon monoxide 0-1000PPM, oxygen 0-30% VOL, hydrogen sulfide 0-100PPM. Suitable for use in many places. 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.
2, The difference between natural diffusion and pump suction
Gas detectors are known to have two common detection methods, one is natural diffusion and the other is pump suction. However, the difference between these two methods is unknown. Natural diffusion slowly senses gas without applying any external force, while pump suction uses a self-priming pump to autonomously suck gas. For example, the human nose responds faster, so when choosing, it is important to carefully consider the detection method in order to effectively detect gas.
3, What is using oxygen to measure nitrogen?
Oxygen and nitrogen are common gases, with the main components in air being 30% oxygen and 70% nitrogen. Due to the high price of nitrogen specific sensors, some people choose to use oxygen sensors to measure nitrogen. In fact, it is possible to subtract the oxygen content value from 100 to obtain the oxygen content value.
4, Is the gas detector explosion-proof?
The gas detector needs to be checked to see if it has reached the explosion-proof level. The general explosion-proof levels of the detector are BT3, BT4, and CT3, so when we purchase the detector, we can focus on these explosion-proof levels.
