The Coolrite Electronic Leak Detector, No. 55100-R-CL, provides three levels of senstivity and five levels of detection. With a visual leak indicator, this product detects leaks as small as 1/10 oz per year and can detect all refrigerants including CFCs, HCFCs and HFCs. This leak detector meets SAE J1627 and CE conformity, and comes in a custom molded carrying case.