Because all vehicles are currently being designed with smaller a/c refrigerant charges and tighter seals, there is a need for an improved class of electronic refrigerant leak detectors capable of finding very small leaks. In response to this need, and to reduce refrigerant R134a emissions and establish leak detector performance standards, SAE International published a new automotive refrigerant leak detector Standard J2791 in September of 2008. Leak detectors that comply with J2791 will identify smaller refrigerant leaks when servicing all motor vehicle a/c systems and will deliver stable performance without false-triggering distractions. SAE J2791 has become the Standard by which all probe-type leak detectors should be measured.
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