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The Detecto-Pak 4 (DP4) is a portable gas leak detector based on proven Flame Ionization technology. The DP4 can be used for walking and mobile leak surveys. The robust internal sample pump allows for rapid response time; readings are from 0-10, 0-50, 0-100, 0-1,000, and 0-10,000 parts per million (PPM). Additional features include a large backlit display with visual and audio alarms, auto fuel shut-off, hot wire ignition and a convenient membrane touch pad top panel that allows easy fingertip instrument operation.