General Monitors is a leading manufacturer of gas detection and flame detection products. We offer a variety of fixed gas detectors that monitor for combustible gas (e.g. methane, propane, butane, ethane), toxic gas (e.g. hydrogen sulfide, carbon monoxide, chlorine, chlorine dioxide, ozone, sulfur dioxide) and oxygen deficiency. Our gas detectors utilize a variety of technologies including electrocatalytic, electrochemical and infrared. Our products are found all over the world in a variety of industries including water and wastewater.