Which gas detector is suitable for use in mines?
What kind of gas detector is needed underground in coal mines? This is a direct issue related to the safety of workers' lives and production safety. Coal mining is a very dangerous job, and the large amount of gas in the well poses a serious threat to workers. Only by carrying portable gas detectors with you, timely understanding the concentration of dangerous gases on site, and evacuating and taking measures before danger strikes, can disasters be prevented.
So, what kind of portable gas detector is needed underground in mines? The main component of gas is methane, and its danger also comes from methane. Due to its colorless and odorless nature, methane can reach explosive concentrations unconsciously. At this time, any spark can immediately cause an explosion. Therefore, staff need to carry portable methane detectors with them to monitor the methane concentration on site in real time, so as to avoid gas explosions.
There will be gas leaks, toxic gases such as hydrogen sulfide and carbon monoxide under the coal mine, and it is also prone to oxygen deficiency.
So below the coal mine, a composite four in one gas detector is usually used, which can simultaneously detect four types of gases.
In addition to the above four gases, other toxic gases may also be produced depending on the geology.
Precautions for calibration of combustible gas detectors: In principle, standard sample gases that have been certified and matched with the detected gas should be used. The selected standard gas for the same tested medium is different, and the points are also different. Before verification, the surrounding environment of the probe should be free of flammable gases. If there is combustible gas, the rain cover should be removed first, and a certain amount of clean air should be filled before continuously introducing the sample gas to ensure the accuracy of the verification. When the tested gas is a mixture of hydrocarbons, isobutane is the sample gas, followed by propane. For hydrocarbon mixtures with significantly different heat generated during combustion of non hydrocarbon mixtures or gases with lower explosive limits, readily available and stable single component fuels such as butane, isobutane, propane, etc. can be used as sample gases when necessary. At this point, the range of the regulator must be adjusted based on a certain detection signal conversion relationship.
