... Leak Detector, Refrigerant Gas Leak Detector, DSA-200, 0.1 oz/yr(3g/year), The most technologically advancedIntroduction ... the DSA-200 will detect leaks as small as 0.1 oz/yr(3g/year) in R12,R22, ... useful features to enhance the usability.1-5 levels range for real-time sensitivity cycle adjustment.6 pieces ... of LED displays the leak degree in large range in the form of "gradually lights the light" ...