BW TECHNOLOGIES, Carbon Monoxide/Oxygen, CO/O2, Multi-Gas Detector, 2 Gas, North America - 23M956|QT-X00M-A-Y-NA - Grainger
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BW Clip4 Multi-Gas Detector - Combustible (%LEL), Oxygen (O2), Hydrogen Sulfide (H2S), Carbon Monoxide (CO) Detector - BWC4-B-N
HONEYWELL, Carbon Monoxide/Hydrogen Sulfide/Lower Explosive Limit/Oxygen/PID, Multi-Gas Detector Kit - 498Z89|MAB3-A2C112E-42M - Grainger
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WESHLGD Plug-in Type Carbon Monoxide Alarm, CO Detector Monitor with LED Digital Display and Voice Alert for Home/Kitchen -1 Pack - Amazon.com
Airgas - B86MCXLX00MYNA - BW Technologies by Honeywell MicroClipXL™ Portable Oxygen And Carbon Monoxide Gas Monitor
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