Infrared Absorption Spectroscopy, More Accurate? 10-Year Sensor Life, 2 modes of sensitivity with maximum sensitivity up to 400ppm/yr. The CO2 refrigerant leak detector has strong anti-interference ability, faster response speed, more accurate and longer service life. Audible & Visual Alarm with Mute Function? When the leakage is detected, the CO2 gas leak detector screen will show the leakage level, and more rapidly it beeps. Press the MUTE button to turn on/off the buzzer. User-friendly Design? Reset Function of the Carbon Dioxide freon leak detector allows you to identify leaks without the false positives of the background concentration. Peak function records the max. The built-in 3000mAh rechargeable battery of the freon tester is more environmentally friendly and provides continuous 6 hours working time. 16 inch ridged gooseneck to help access hard to reach areas. Worries Free R744 Gas Detector? Meet EN14624, SAE-162, SAE-2791 and SAE-2913 standards. 15 x 12 x 2 inches.