AccuTools eL-520 Refrigerant Gas Leak Detector works to detect leaking refrigerant gases in a variety of fields including commercial, residential, industrial and automotive air conditioning and refrigeration. The AccuTools eL-520 locates all HFC, CFC and HCFC refrigerants including R134A, R12, R22 and blends such as R404A, R408A, R 409A, R 410A. The AccuTools eL-520 is designed with a state-of-art microprocessor for fully automatic operation and thus requires very little battery power to run, extending operation time.