R-142b is a "hydrochlorofluorocarbon" mainly used as a refrigerant in heat pump applications.
R-142b is a substitute for the R-114 "chlorofluorocarbon" (CFC) intended for some applications. Also used in blend R-142b/R-22 as a replacement for R-12.
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Heated diode sensor. 3 sensitivity levels, suitable for all fluids CFC's, HCFC's, HFC's and HFO's, leaks signalled by audio alarm + LED, battery or mains powered.