55975, Intellasense III Combustible Gas Leak Detector55975 Includes only:Blow molded case2 "C" batteriesLeak test vialReplacement filtersFeatures with all optional accessories:Detects combustible gases (see below)Heated tin oxide sensing element2000 hour sensor lifeLess than 1 second respond time50 – 1000 ppm ultimate sensitivityBattery: 2 'C' Alkaline 6000 mAh batteriesOperating Temperature Range: 0° F to 120° FIntelligent tip 15' inch probe length with environment sensing element to eliminate the potential of false alarmsSix vertical LED display with enabled selectively (red, yellow or green) to display information to the user such as the relative signal level of the detected leak, the selected sensitivity range (low/medium or high) of the unit, diagnostic information such as low battery, interference/wait, contaminated atmosphere readiness of the unit or fault conditions of the unitKeypad control with ON/OFF button (push-on/push-off), Volume/Mute button (high, low or mute), Sensitivity button for high, medium and low sensitivity level selection and Peak button when multiple leaks are suspected (push enable/disable)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 55975 Combustible Gas 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 its life.Detects: Acetone, Acetylene, Ammonia, Benzene, Butane, Butanol, Chlorine, Ethane, Ethanol, Gasoline, Hexane, Hydrogen, Hydrogen Sulfide, Isobutane, Methane (natural gas), Methanol, Methyl Acetate, Methyl Chloride, Methyl Ether, Naptha, N-Butane, Pentane, Propane, Propanol, Sulfer Dioxide and Trichloroethane.