Electronic Refrigerant Leak DetectorElectronic Refrigerant Leak Detector User selectable, three position sensitivity switch minimizes false triggering and allows for easy diagnosis of small, medium and large leaks Sensitive to R 12, R 134a, R 1234yf and other refrigerants. Sensitivity detects leaks down to 0. 1 oz year (3 g year) Infrared sensor provides consistent response and cannot be poisoned by exposure to large amounts of refrigerants High efficiency air sampling pump provides