D540 - Combustible Gas Leak Detector

The D540 utilizes a solid state heated sensor designed for high sensitivity to all combustible gases including Methane (Natural Gas), Propane, Butane, Ethane (R170), Acetylene, Methanol, Acetone and Gasoline. MSHA Certified as Intrinsically Safe. Inspect furnaces, gas appliances and gas lines fast and safely. Also use to find leaks in fuel and exhaust systems plus verify integrity of fuel storage containers. The D540 uses standard AA alkaline batteries and does not require rechargeable batteries. The unique digital display allows for quick, precise pinpointing of the leak source and also determines the size of the leak. Housed in rugged high impact ABS plastic. Storage case included.


  • Numeric leak indicator alarm
  • Automatic calibration
  • 3 sensitivity levels
  • Low battery indicator
  • Uses 4 AA alkaline batteries
  • Audio mute function
  • Comfortable neoprene grip
  • MSHA Intrinsic Safety Certified
  • CE Certified
  • Long life sensor
  • 2 year warranty

D540 Specifications

Model # D540
Name Leak Detector, Combustible Gas
Sensitivity 10 ppm (methane)
Sensor Life >500 hours
Power Supply 4 AA Alkaline batteries
Battery Life 30 hours continuous
Warm up time  
Probe length 17 inches
Numerical Display 1 to 9
Weight, lbs 1.25 lbs
Warranty 2 years


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