... R134a, R12,R22 ect Small size intelligent Refrigerant Gas Leak Detector for R134a, R12, R22 CT-CPU02 / CT ... voltage indicate Built –in pump detect all halogen gas leak Maximum resolution 3g/ya use 2 ‘AA’ alkaline ... Detect R134a, R12,R22 ect Detect all halogen gas leak Built –in pump provide positive air flow to ... ”(33.5cm) Small size intelligent Refrigerant Gas Leak Detector for R134a, R12, R22