1. Industrial standard alarm valueAccording to industry standards, the alarm values of hydrogen sulfide detectors are usually 10ppm (low concentration alarm) and 30ppm (high concentration alarm). When the concentration exceeds 10ppm, a low concentration alarm will be issued; When it exceeds 30ppm, a high concentration alarm will be issued, indicating that the environment has reached a dangerous level and emergency measures need to be taken immediately.

2. Occupational exposure limitAccording to the national standard GBT50493-2019, the occupational exposure limit (OEL) for hydrogen sulfide (H2S) gas has a high allowable concentration of 10mg/m ³ and a direct hazard concentration (IDLH) of 430mg/m ³. Shenzhen Yiyuntian Electronics Co., Ltd. suggests that the first level (low report) warning value for H2S and hydrogen sulfide gas concentration should not exceed 6ppm, and the second level (high report) warning value should not exceed 20ppm.

3. measurement rangeThe measurement range of hydrogen sulfide detectors is usually wide, which can be extended from 0-20/50/100ppm to 10000ppm or even higher, to meet the detection needs in different scenarios.

In summary, the normal concentration range of hydrogen sulfide detectors should be determined based on specific application scenarios and relevant standards. In practical operation, it should be ensured that the alarm value of the detector is set reasonably and calibrated regularly to ensure the accuracy and reliability of the detection results.