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725a Pocket Combustible Gas Leak Detector – 40ppm Sensitivity


The 725a offers 40 ppm sensitivity to detect combustible gasses including natural gas, methane, propane (LPG), diesel, and kerosene.

In stock


Trace fuel lines, tanks and containers for gas leaks. Once a leak is detected, the 725 will sound an alarm and the red LED’s will light showing level of leak.

  • 40 ppm sensitivity
  • Trace natural gas lines and fittings for leaks
  • Check gas equipment for leaks
  • Test propane tanks, fittings, lines, and heaters for leaks
  • Check propane tanks, fitting lines, and heaters for leaks
  • Test confined spaces for gas build-up
  • Fits in shirt pocket
  • Responds instantly

Standard accessories:

  • Instruction Manual
  • Battery and Sensor (Installed and Calibrated)



Product Documentationpdf-icon1

Click below to view or download product documentation PDFs:

725A Manual

725A Data Sheet


 Model 725A Specifications
 Combustible Gasses Detected (Partial List) Methane, Natural Gas, Gasoline, Diesel, Propane (LPG), Butane, Kerosene
 Sensitivity 40 ppm (methane)
 Operating Temperature 32° to 104°F or 0° to 40°C
 Response Time Instantaneous
 Leak Indication Audio / Visual
 Battery 1.5 volt, AAA Alkaline (2 each)
 Battery Life 3 hours continuous use

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