Your browser is not supported. For the best experience, you should upgrade to a modern browser with improved speed and security.

Fieldpiece SCM4 - Standalone Carbon Monoxide (CO) Detector

Item: SCM4
Checking price...
Decrease quantity
Increase quantity

Your Order Templates
Save products for later, or create lists to quickly re-buy items for routine jobs.

Add to Order Template

Inventory At Nearby Branches



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 SCM4 Carbon Monoxide Detector (CO Detector) offers several features and benefits to field technicians:
  • Field-replaceable CO sensor - Easy to install - Lasts approximately two years - Comes pre-calibrated.
  • 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.


NameFieldpiece SCM4 - Standalone Carbon Monoxide (CO) Detector
Gemaire Item NumberSCM4
Manufacturer Product NumberSCM4
SKU - PIM Number1410349363578
ERP Number338865
Unit of MeasureEACH
Weight0.5 Pound (lb.)
Length2.0 Inches (in)
Width6.0 Inches (in)
Height9.0 Inches (in)
Hazardous MaterialNo
EPA Cert RequiredNo
Country of OriginTWN
Power Source9V Battery
Carbon Monoxide Measurement Range0 to 1000 ppm; 0 to 2000 ppm (less than 5 minute exposure time) Initial Acc
Auto Power OffYes
Digital ReadoutYes
Low Battery IndicatorYes
Accuracy73°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
Includes CaseNo
Recommended Calibration CycleTo zero, hold the ZERO button for one second or until “ZERO” is displayed. (Note: For safety reasons the SCM4 will not zero if reading is above 5ppm.)
ColorBlack, Yellow
Maximum Working Temperature122°F (50°C)
On/Off SwitchYes
Operating Temperature Range32°F to 122°F (0°C to 50°C)
Response TimeSeconds
Warm-up Time10 Seconds
Warranty OfferedYes
GEM - Case Quantity