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Multi-Gas Clip Simple (H2S, CO, O2, LEL)
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GD-7291 Precision Combustible Methane Propane Gas Leak Detector – Gain Express
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Natural Gas Detector and Propane Detector; Gas Leak Alarm for Home, Kitchen, Camper, Trailer, RV; Monitor Combustible Explosive Gases Like LPG, LNG, Methane, Butane; eBook - Amazon.com
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Ammonia (NH3) Handheld Gas Detector | CO2Meter.com
Coreel Portable 4 Gas Detector, Sound Light Vibration Multi-Gas Monitor Meter, Rechargeable LCD Screen Backlight -Ready to Use… - Amazon.com