Wastewater treatment plants use and produce highly toxic and combustible gases like hydrogen sulfide gas, methane gas, ammonia, ozone and chlorine, throughout the treatment process. In the event a combustible gas like methane or ammonia ignites, it's critical to have flame detectors in place to immediately detect flames before they cause more damage. Rosemount™ 975 Flame Detectors can quickly detect fires at long distances with a high immunity to false alarms.