The Ridgid Micro CD-100 Combustible Gas Detector provides simple and quick readings to identify the presence of combustible gases. Detects Methane, Propane, Butane, Ethanol, Ammonia, Hydrogen and many other combustible gases. With adjustable sensitivity, even low-levels of gases can be detected. Ideal for ensuring proper gas line installations, checking for maintenance and repair needs, or quickly pinpointing combustible gas leaks. The rugged ergonomic design makes it capable of withstanding jobsite rigour. Tri-Mode Detectionprovides visual, audible or vibration alert which can be adjusted for different environments. A 16in flexible probe allows location and detection of leak in hard-to-reach and confined spaces. Specifications: Detection Range: 0- 6,400ppm (Methane).Alarm Sensitivity: 40ppm (Methane).Calibration: Automatic.Power: 4 x AA batteries (supplied).Classifications: Class B, Division 1.