AirRadio Combustible Gas Leak Detector Portable 4 in 1 Gas Detector Rechargeable Natural Gas Tester Alarm O2, CO, H2S, LEL Gas Sensor Tester Analyzer LCD Display - Amazon.com
Four Gas Monitor, confined space detector features simultaneous detection of LEL, O2, H2S & CO. World's smallest and lightest portable multigas Detector. RKI's high quality safety instrument.