The propane halide leak detector instantly locates noncombustible halide (CFC & HCFC) refrigerant gas leaks. Leaks are located when the refrigerant gases are drawn in through the probe hose and exposed to a copper reactor plate, changing the blue flame to green. The detector is very sensitive and can be used to locate leaks as small as 20 ppm of CFC and HCFC refrigerants.