Hydrogen sulfide, H2S, is a very poisonous, corrosive, and flammable gas. As such, it needs to be carefully monitored and controlled in industrial processes where it is generated or used. At relatively low concentrations, it has an odour of rotten eggs which effectively works as a warning, but at higher concentrations where it becomes acutely toxic and even lethal, it can no longer be smelled and the awareness of danger disappears.
It is important to be able to monitor concentrations of hydrogen sulfide, both from a process control perspective and for safety reasons. Read more about it in our blog post >>