Airgas - I24VTS-K1232111101 - Industrial Scientific Ventis® MX4 Portable Carbon Monoxide, LEL, Hydrogen Sulfide, Pentane And Oxygen Multi Gas Monitor
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Scondaor Portable 4 Gas Detector Meter, 4 in 1 Multi Gas Monitor Tester with Digital LCD Display, Rechargeable Battery Powered, Voice Sound Light Shock Alarm (Orange) - - Amazon.com
Multi Gas Clip with Pellistor LEL Monitor Page
RKI Instruments GX-2009 Personal Gas Monitor, 4 Gas, LEL / O2 / H2S / CO with Alligator Clip, No Charger - 72-0314RK