Intella Sense II Refrigerant Leak Detector packaged in a blow molded case with 2 “C” batteries, leak test vial and replacement filters Design certified by Intertek to meet J2791 (R134a), J2913 (R1234yf) and EN 14624 At the heart of this leak detector is a new low power metal oxide gas sensor with superior performance properties such as lower current consumption and sensor longevity. The new sensor is characterized by high sensitivity and fast response upon detecting the presence of extremely small levels of chlorofluorocarbon gases. For this reason, this sensor was selected and integrated into the 55900 Leak Detector. In addition, a powerful microprocessor was integrated into the design that automatically selects the best operating condition for the sensor to ensure optimum performance throughout the life of the sensor. SPECIFICATIONS: SENSITIVITY: HIGH ≥ 0. 15 oz. /yr. (4 g/yr. ), MEDIUM ≥ 0. 25 oz. /yr. (7 g/yr. ), LOW ≥ 0. 50 oz. /yr. (14 g/yr. ) DISPLAY: Six vertical LED’s (red, yellow or green) display: relative signal level of the detected leak, selected sensitivity range (low/medium or high) of the unit, diagnostic information SENSOR LIFE: 2000 hours OPERATING TEMPERATURE RANGE: 0 to 140˚F RESPONSE TIME: Less than 1 second POWER: 2 C Alkaline 6000 mAh batteries BATTERY LIFE: 30 hours WEIGHT: 1. 08 lbs. KEYPAD FUNCTIONS: ON/OFF button turns the unit on or off, VOLUME/MUTE button controls the volume of the unit, H M L SENSITIVITY button selects the desired sensitivity level, PEAK/HR/LR button serves a dual purpose: (1) Assists the user in locating the “largest leak” in a system with multiple leaks present (2) Enable the user to switch between HR (high range) and LR (low range) modes.