Hydrogen sulfide (H2S) is a colorless, poisonous, corrosive and flammable gas. It is produced naturally from the microbial breakdown of organic matter such as in sewers, and is often associated with the smell of "rotten eggs."
Although the odor of hydrogen sulfide gas can be detected in as small as 0.00047ppm, OSHA limits exposure to 10ppm over an 8-hour workday. At concentrations above 800ppm H2S is dangerous to humans.
GasLab offers hydrogen sulfide sensors useful in environments where exposure to H2S can be harmful.
Note that electrochemical sensors must be stored in sealed containers between 37° and 68°F (3° and 20°C) for long life. Some suppliers do not do this. Our sensors are stored in sealed containers in a refrigerator at 40°F (4.4°C) to provide the longest sensor lifespan when it is delivered to you.