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Tool & Equipment

The ET120 is the perfect choice for HVAC professionals. It is an easy-to-use tester that provides audible and visual alarms in the presence of methane, propane, and other combustible gases at concentrations as low as 50 ppm. It features two levels of sensitivity depending on users’ needs: High (approximately 50 to 1000 ppm) and Low (approximately 1,000 to 10,000 ppm). Gas Leak Detector with 18-Inch flexible gooseneck. Combustible gas detection range: 50 to 10000 ppm. Combustible gas detection range: 50 to 10000 ppm. Over-molded body for comfortable grip. Auto power-off after 10 minutes of non-usage conserves battery life. Includes detector, 4xAAA batteries, instruction manual, and storage pouch.


  • Detection Range: Approximately 50 to 10,000 ppm (based on Methane)
  • Two Levels Of Sensitivity: High (approximately 50 to 1000 ppm) and Low (approximately 1000 to 10,000 ppm)
  • Five red LED’s (visual) and 85dB audible alerts that increase with gas concentration
  • Automatic zero-point calibration at power-up (lights will flash during self-calibration, this does not indicate the presence of gas)
  • 18-Inch flexible gooseneck expands sensor’s reach, clips onto meter for storage


  • Brand: Klein Tools
  • Style: Combustible Gas
  • Power Source: Battery Powered
  • Product Dimensions (LxWxH): 28.3 x 1.79 x 2.71 inches
  • Product Weight: 13 Ounces
  • Alarm: Audible, Visual