Fieldpiece SCM4 Carbon Monoxide Detector

Minimum Purchase:
1 unit
  • SCM4 CO Standalone
  • Fieldpiece SCM4 Carbon Monoxide Detector
MSRP: $347.00
Price: $294.95
— You save $52.05


Fieldpiece SCM4 Carbon Monoxide Detector

Get Real-Time Results.

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 almost instantly to changes in CO levels in the air. If you see a difference in CO levels from outside to inside, you need to find the source of the CO. Walk around and watch the display. By constantly going towards the area of higher concentration, you can determine the source of the CO. Persistent sources of CO, such as malfunctioning combustion equipment in occupied spaces, must be serviced immediately. These can be life threatening. When searching for sources of CO, make sure that you never put yourself or anyone else in danger of excessive exposure to CO. Overexposure to CO can have long-term health effects and can be fatal.

Key Features and Benefits

  • Zero the unit outdoors away from any source of CO
  • Enter the structure
  • Walk around and watch the display
  • Move toward the area of highest concentration to find the CO source
  • Field-replaceable CO sensor
  • Fast electrochemical sensor helps you find CO sources like cracked heat exchangers or breached flue stacks
  • Calibrate to ambient quickly with ZERO button
  • Audio and visual alarms (with MUTE function)
  • Alarm rate increases as carbon monoxide concentration increases
  • MAX hold to help you zero in on the source
  • Bright-blue backlit dual-display to test in dark crawl spaces
  • Magnetic hanger for hands free testing
  • Auto Power Off (APO) to save battery life (easy to disable)
  • Battery check with % of battery life left displayed


Sensor Type Electrochemical (specific to CO)
Sensor Calibration Factory calibrated @ 17ppm CO and 200ppm CO
Range 0 to 1000 ppm; 0 to 2000 ppm (less than 5 minute exposure time)
Initial Accuracy (@ 73°F±9°F, <75% R.H.) 0-15ppm ±5% reading ±1 ppm after zeroing
16-35ppm ±5% reading ±2 ppm after zeroing
36-1000ppm ±5% reading ±5ppm after zeroing
Long Term Drift less than 5% per year (depending on use)
CO Air Sample Temperature Range 32 to 105°F
Operating Environment 32 to 122°F (0 to 50°C); 15 to 90% R.H., non-condensing
Storage Environment 32 to 68°F (0 to 20°C) at <80% R.H. with battery removed from meter
Battery 9V
Battery Life 150 hours typical alkaline
Auto Power Off After 15 minutes


  • (1) Carbon Monoxide Detector - SCM4
  • (1) 9V Battery (installed)
  • (1) Operator's Manual
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