The ZEH04 module is a high-performance, versatile infrared + electrochemical module that detects SF6 and O₂ in the air and outputs the collected signals. It uses a two- or three-electrode electrochemical sensor to detect oxygen concentration and non-dispersive infrared technology to detect sulfur hexafluoride gas. This two-in-one module perfectly combines electrochemical and infrared sensors to meet users' needs in various gas detection applications.