Jan 15 2016 DY5750B Refrigerant Leak Detector By dyinstrument adjustable sensitivity as low as maximum 14g/yr (0.49oz/yr) Audible ticker signaland visual leaksize indicator Target includes CFCs:R12,R11,R500,R503; HCFCS: R22,R123,R124,R502; HCFCs. R134a,R404a, R125; SF6,Halogen gases Adjustable sensitivity, fast warm-up Goose neck probe