Check the listing for details. Mastercool 56100 Electronic Refrigerant Leak Detector. Condition: New. Listed at 209.99 USD. Mastercool 56100 Electronic Leak Detector Mastercool introduces the Next Generation in Electronic Leak Detection! The 56100 offer revolutionary new features and state of the art micro processing technology. The new design sensor delivers an accurate and instantaneous response. Unit comes in a heavy duty custom molded carrying case and meets SAE J1627 and CE conformity. Features: Digital Signal Micro Processor Auto Release Feature Detects All Halogenated Refrigerants Battery Test Feature Flexible 16" Probe Variable Frequency Audible Alarm Keypad Control Meets SAE J1627 / CE Conformity Power Supply (2 C Batteries) Includes Custom Molded Carrying Case 3 Levels Of Sensitivity (5 Levels Of Detection) Visual Leak Level Indicator Detects Leaks As Small As 1/10 oz Per Year Detects All Refrigerants, CFC'S, HCFC'S, HFC'S