BW TECHNOLOGIES, Carbon Monoxide/Hydrogen Sulfide, CO/H2S, Multi-Gas Detector, 2 Gas - 5ZXF8|QT-00HM-R-Y-NA - Grainger
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Handheld Carbon Monoxide Meter, Portable CO Gas Detector, Gas Tester with 0~1000ppm Range, 1PPM Resolution(Battery NOT Included) - - Amazon.com
INDUSTRIAL SCIENTIFIC, CO/CO2/LEL/O2, Audible/Vibrating/Visual, Multi-Gas Detector, 5 Gas - 1TAL7|MX6-K103Q211W/ IR - Grainger
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Handheld Carbon Monoxide Meter, Portable CO Gas Detector, Gas Tester with 0~1000ppm Range, 1PPM Resolution(Battery NOT Included) - - Amazon.com
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Handheld Carbon Monoxide Meter, Portable CO Gas Detector, Gas Tester with 0~1000ppm Range, 1PPM Resolution(Battery NOT Included) - - Amazon.com
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SMART SENSOR Handheld Carbon Monoxide Meter with High Precision CO Gas Tester Monitor Detector Gauge LCD Display Sound and Light Alarm 0-1000ppm - Walmart.com
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