JB Industries LDC-4000 Combustible Gas Detector measurement tool

Combustible Gas Detector LDC-4000

The JB Industries LDC-4000 detects a wide range of combustible gases including methane, propane, butane and gasoline vapours. It is built for technicians who need to locate leaks in HVAC, automotive or industrial settings. Automatic calibration simplifies start-up and a low-battery indicator warns before power runs out. A carrying case is included for transport and storage.

17-inch probe and rugged case

The flexible 17 in probe reaches into tight ductwork, engine bays or around fittings without forcing the operator into awkward positions. At 14 in overall height the unit fits comfortably in a tool bag or on a belt clip. The supplied carrying case protects the sensor head and electronics from knocks and dust during daily service calls. Automatic calibration runs each time the detector powers on, reducing routine checks.

Detection limits and temperature range

Sensitivity is rated at 5 ppm for methane with a matching detection range starting at the same threshold, so very small leaks may remain undetected. Operation is specified from -4 °F to 122 °F; environments outside this window can cause inaccurate readings or sensor damage. The detector carries no formal calibration certificate, so users requiring traceable documentation must arrange independent verification.