For the growth and application of art paint gas detectors, research reports issued by the National Institute for Occupational Safety and Health (NIOSH) and the US Occupational Safety and Health Administration (OSHA) have expressed that many fatal confined space accidents are related to the gas components in these spaces. These hazardous components may already exist before workers enter the confined space or be generated due to their activities inside. The vast majority of accidents occur due to the lack of detection of hazardous gases before workers enter confined spaces and during work. All these studies highlight the importance of hazardous gas detection at various stages involving entry into confined spaces. Miners may be among the first workers to recognize the need for a hazardous gas detection device. The gas composition in mines represents a variety of dangerous situations, including toxic gases such as carbon monoxide, carbon dioxide, nitrogen oxides, sulfur dioxide, etc., as well as oxygen deficiency. In some cases, methane may reach explosive concentrations. Since methane has no warning characteristics, it may accumulate to an immediately explosive concentration before workers realize the danger. The appearance of any ignition source, such as a miner's lamp, could trigger an explosion. The emergence of the first combustible gas indicator, the Davy lamp, provided safety assurance for workers. Variants of this lamp are still used in mine safety detection today. Carbon monoxide is one of the major hazards of concern for miners. Similarly, due to its lack of warning characteristics, workers can often unknowingly be exposed to extremely dangerous concentrations. Using small animals, like birds, for example, the famous "mine canary," was the only way to quantitatively detect toxic gases during that era. Later, colorimetric tubes for measuring carbon monoxide appeared and were widely used in various places where this hazardous gas existed. Subsequently, colorimetric tubes for detecting oxygen concentration also emerged.
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