Hydrogen sulfide is a flammable and toxic gas, mainly from refineries, chemical plants, desulfurization plants, oil/gas wells or sewers, swamps and other environments, and its different concentrations have different hazards to the human body. Therefore, in general, in order to ensure safety, we need to install hydrogen sulfide detector to safely detect the concentration of hydrogen sulfide in places where hydrogen sulfide may exist, so as to ensure that the concentration is controlled within a certain range and avoid personnel poisoning. Do you know the alarm value of H2S detector ? The following is a brief introduction by yi yun Tian:

hydrogen sulfide is a kind of toxic and harmful gas, which is second only to highly toxic and easy to cause death. Its toxicity is 5 to 6 times that of carbon monoxide (CO) and 7 times that of sulfur dioxide (SO2). Its lethal concentration to the human body is 500ppm, and under normal circumstances, the safety critical concentration to the human body cannot exceed 20ppm.

when people inhale (70~150 mg/m)/(1~2h) hydrogen sulfide, respiratory tract and eye irritation symptoms will occur, olfactory nerve will be paralyzed, and odor will no longer be smelled after 2~5min of inhalation. Inhalation (300 mg/m)/1h,6~8min acute eye irritation symptoms, a little longer contact caused by pulmonary edema. Inhalation of hydrogen sulfide can cause depression of the central nervous system and sometimes death due to irritation and respiratory paralysis.

Therefore, in accordance with the relevant provisions of the GB 6222-2005 Industrial Gas Safety Regulations, Hygienic Standards for Design of Industrial Enterprises (GBZ1-2002), and Occupational Exposure Limits for Hazardous Factors in Industrial Sites (GBZ2-2007). The level 3 alarm value of hydrogen sulfide detector is:

level 1 alarm value: 1/2 TLV = 5ppm.

Level 2 alarm value: 1TLV = 10ppm.

Level 3 alarm value: 2TLV = 20ppm.

the alarm value of hydrogen sulfide detector like yiyuntian is usually set in the range of 0 ~ 10ppm, 50, 100, 200, 1000, 2000, 5000 and 10000ppm, and other ranges can also be customized if necessary.

this kind of hydrogen sulfide detector can not only detect the concentration of hydrogen sulfide during use, but also alarm the concentration of hydrogen sulfide in the environment during detection. when the concentration of hydrogen sulfide in the environment exceeds the safe value, the hydrogen sulfide detector will send out various alarm signals to remind the staff to take corresponding safety protection measures in time, avoid the occurrence of major accidents, so as to better protect personal safety.