Robinair 22791 InfraRed Refrigerant Leak Detector Automatically recalibrates in highly contaminated areas to help pinpoint the exact location of the leak Advanced infrared sensor designed to last a minimum of 10 years Senses CFC HFC and HCFC blend refrigerants Visual alert and peak button make it easy to find leaks in noisy environments Meets NEW SAE J2791 leak detection standard.Dimension:12.60in x 4.20in x 11.00in