Refrigerant Gas Leak Detector The ATD 3698 meets the new SAE J2791 standard. Detects all HFC, HCFC & CFC refrigerants. including SNAP blends. Long life heated sensor. Automatic calibration & reset to ambient levels. 3 adjustable sensitivity levels True mechanical pump. Low battery indicator. Uses 4 AA Alkaline batteries. SAE J2791 & CE certified. Made in the USA. 2-year warranty including the sensor. Sensitivity: 0.5 oz./yr R134a. 0.03 oz./yr R22. Sensor Life: 300+ hours. Response Time: Instantaneous. Battery Life: 8 hours continuous. Warmup Time: Less than 20 seconds. Probe Length: 17” 3698