Quickly locate leaks of combustible gases with the Dwyer CLD20 Combustible Leak Detector. The CLD20 provides accurate detection of Methane, Butane, Ammonia, Ethylene Oxide, Alcohols, Industrial Solvents and other combustible or toxic gases. Its adjustable tick rate accelerates as the sensor tip approaches a leak and can be re-zeroed to pinpoint the exact location of the leak. The Model CLD20 offers visual LED indication of leak level, automatically recalibrates when turned off and on, and has a flexible gooseneck and small sensor head for use in tight, difficult to reach areas.