The SCM4 Carbon Monoxide Detector (CO Detector) offers several features and benefits to field technicians:

• Field-replaceable CO sensor [ Part # RCM4 ]
• - Easy to install
  - 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