An SF6 gas analyzer can detect multiple key parameters, including SF6 gas purity (concentration), moisture/humidity (usually reported as dew point in °C or ppmv), and decomposition byproducts such as sulfur dioxide (SO₂), hydrogen sulfide (H₂S), carbon monoxide (CO), and sometimes HF or CF₄. Advanced models may also measure gas pressure and temperature to support comprehensive condition assessment of high-voltage electrical equipment.

SF6 gas analyzers are primarily used for testing and maintaining gas-insulated electrical equipment, including gas-insulated switchgear (GIS), high-voltage circuit breakers, transformers, ring main units (RMUs), and substation busbars. They are essential in power utilities, industrial plants, and renewable energy facilities (e.g., solar/wind substations) where SF6 is used as an insulating medium. These analyzers support commissioning, routine maintenance, fault diagnosis, and end-of-life gas evaluation—ensuring safety, reliability, and regulatory compliance.