... time sevsitivity adjust 3.Battery voltage indicate 4.Detect R134a, R12,R22 ect Small size intelligent Refrigerant Gas Leak Detector for ... R134a, R12, R22 CT-CPU02 / CT-CPU 05 are Micro processor control ... board Real – time sevsitivity adjust Battery voltage indicate Detect R134a, R12,R22 ect Detect all halogen gas leak Built –in pump ...