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Electronic and supplementary leak detectors for pinpointing refrigerant losses in refrigeration, air-conditioning and heat-pump systems. For HVAC/R technicians carrying out the leak checks required under F-gas regulations.
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Leak detectors are used to precisely locate refrigerant escapes at flare joints, brazed connections and heat exchangers. Electronic detectors respond to HFC/HFO refrigerants (R32, R410A, R134a) and to flammable A2L refrigerants, signalling a leak with a progressive tone and a bar indicator. They are complemented by UV lamps with dye (after a tracer is added to the system), hydrogen detectors (an N2/H2 mix charged into a system that holds no refrigerant) and foaming sprays for bubble tests. Sensitivity is rated in g/year and determines whether even the micro-leaks targeted by EN 378 and the F-gas regulation are detected.
A professional chooses a detector by the refrigerants it must handle — A2L compatibility (R32, R454B, R1234yf) and an intrinsically safe design for use in a flammable atmosphere are essential. Key criteria are sensitivity (ideally adjustable, from 3 g/year upward), sensor type (heated diode, corona, or infrared IR — the most durable and least prone to false alarms), automatic background compensation (auto-zero), sensor response and recovery time, flexible probe length and sensor replaceability. For pressurised tests, availability of OFN nitrogen and a UV tracer compatible with POE oil also matters.