Hydrogen sulfide is a chemical compound with the formula H2S. It is a colorless chalcogen-hydride gas, and is poisonous, corrosive, and flammable, with trace amounts in ambient atmosphere having a characteristic foul odor of rotten eggs. Hydrogen sulfide is one of the leading causes of workplace gas inhalation deaths in the United States. According to the Bureau of Labor Statistics (BLS), hydrogen sulfide caused 46 worker deaths between 2011 and 2017.
Type: Electrochemical
Range: 0-100ppm (0.1ppm resolution)
High Range: 0-500ppm (0.5ppm resolution)
Carbon monoxide and hydrogen sulfide (COSH): CO: 0-500 ppm (1 ppm resolution), H2S: 0-100 ppm (0.1 ppm resolution)
Low Alarm: 10 ppm
High Alarm: 15 ppm
STEL — 15 minute — Short Term Exposure Limit: 5 ppm
TWA — 8 hour time weighted average: 1 ppm
IN ALMOST ALL CASES OF CONTACT WITH H2S, CALL POISON CONTROL AND GO TO THE HOSPITAL
https://www.osha.gov/sites/default/files/publications/hydrogen_sulfide_fact.pdf
https://www.chemicalbook.com/ChemicalProductProperty_EN_CB0122872.htm
https://www.ccohs.ca/oshanswers/chemicals/chem_profiles/hydrogen_sulfide.html