SCM4 – Carbon Monoxide DetectorFieldpiece SCM4 Carbon Monoxide Detector The SCM4 Carbon Monoxide (CO) Detector has a very fast reaction time, and measures CO in parts per million (ppm). Its electrochemical sensor is fast enough for walk around tests. Features and benefits include: Field replaceable CO sensor; Advanced three pin sensor measures 0 to 1000 ppm CO; Calibrate Zero SCM4 to ambient quickly with the ZERO button; Audio and visual alarms w mute; Bright blue, backlit dual
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