Volume 141 Catalog Page: 178, 790Economical and portable detectorDetects natural gas, methane, propane, butane, ethanol, gasoline & ammoniaSensitive to 5 ppm methaneVariable audio alarm and flashing LED3 position switch, chrome-plated 17"" probeCarrying case and 2-D cell batteries includedInficon 718-202-G13-year warranty718-202-G1