What Is the Qualified Value Range for a Gas Detector?
1, Carbon monoxide (CO)
The value of a carbon monoxide detector is usually considered normal within the range of 0-50ppm. Once the concentration exceeds this range, it may indicate a leakage of carbon monoxide or the presence of carbon monoxide produced by combustion in the environment, and immediate measures should be taken to prevent accidents.
2, Oxygen (O2)
The value of the oxygen detector is normal within the range of 19.5% to 23.5%. This range ensures the normal functioning of human respiratory function. Oxygen concentrations below 19.5% may cause hypoxic environments, affecting work efficiency and life safety; And oxygen rich environments above 23.5% also have potential risks, which need to be closely monitored by detectors to be on the safe side.
3, Hydrogen sulfide (H2S)
The qualified value range for toxic and harmful gases such as hydrogen sulfide is relatively strict, generally set within 0-5ppm. Any situation exceeding this limit may pose a serious threat to personnel health.
4, Combustible gas
For combustible gases, their detection values must be lower than their lower explosive limit (LEL) to ensure the safety of the production area. The measurement range of a combustible gas detector is usually 0-100% LEL. In practical applications, combustible gas detectors achieve the purpose of instrument alarm by setting alarm values. According to relevant regulations, the first level alarm setting value of the combustible gas detector should be less than or equal to 25% LEL, and the second level alarm setting value should be less than or equal to 50% LEL.
5, Other toxic and harmful gases
In addition to the above-mentioned gases, common toxic and harmful gases also include ammonia, chlorine, nitric oxide, etc. The values of these gas detectors should be within a safe range, usually below 1ppm.
In short, the qualified numerical range of gas detectors is a key benchmark for ensuring life safety and environmental stability. It is not only a technical standard based on scientific research and practical experience, but also a safety bottom line that must be strictly observed in industrial production, environmental monitoring and other scenarios. Only by mastering these standards and standardizing the use of detectors can their warning function be fully utilized, and a solid defense line for production and environmental safety be established.
