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SCM4 Fieldpiece Carbon Monoxide Detector - Fast Enough for Walk Around Tests. 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-display with MAX and real-time measurements displayed; Magnetic hanger for hands-free operation; Auto Power-Off (APO).
The "Walk-Around" Test: The SCM4 responds to changes in CO levels in real time.
- Zero the unit outdoors away from any source of CO (will not zero if CO levels are higher than 5ppm)
- Enter the structure
- Walk around and watch the display
- Move toward the area of highest concentration to find the CO source
CO Exposure Effects:
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CO ppm
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Effects
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9 ppm
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Minimal. Max allowable
concentration for eight hours (EPA and ASHRAE).
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35 ppm
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Max for continuous exposure for
one hour (EPA and ASHRAE).
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50 ppm
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Max for eight hours (OSHA).
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100 ppm
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Trips installed CO detectors.
UL2034 specifies a max exposure of 100 min.
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200 ppm
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In two to three hours: slight
headache, tiredness, dizziness, nausea. UL2034 specifies a max exposure
of 35 min.
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400 ppm
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In one or two hours: frontal
headaches. In three hours: life threatening. UL2034 specifies a max
exposure of 15 min.
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800 ppm
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In forty five minutes:
dizziness, nausea, and convulsions.
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800 ppm
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In two to three hours: death.
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1,600 ppm
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In one hour: death.
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6,400 ppm
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In fifteen minutes: death.
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12,800 ppm
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In three minutes: death.
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 Warning: This product may expose you to chemicals including lead which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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