The SGM595 is a natural gas sensor. It provides a 4-20mA signal proportional to concentration of gas in air. The sensor is typically powered by, and sends a signal back to, a Duomo gas detector panel. The detector then interprets the signal and is capable of sounding alarms and turning off gas supplies to the protected area. The SGM595 has an automatic drift compensation function. This has made this item our most popular gas sensor.