Fast CO Detection You Can Trust

The Fieldpiece SCM4 Carbon Monoxide Meter is your go-to tool for accurate, real-time CO testing. Whether you're tracking cracked heat exchangers or checking flue stacks, this compact meter gives you reliable ppm readings with walk-around flexibility.

Top Features

• ✅ Real-time CO readings from 0 to 1000 ppm
• ✅ Fast-response electrochemical sensor – ideal for walk-around tests
• ✅ ZERO button lets you calibrate to ambient quickly
• ✅ Audio & visual alarms (with mute function)
• ✅ MAX Hold mode helps you pinpoint the CO source
• ✅ Backlit dual display – perfect for dark areas
• ✅ Magnetic hanger for hands-free testing
• ✅ Auto Power Off to save battery (can be disabled)

Built for Field Technicians

Designed for HVAC professionals, the SCM4's field-replaceable sensor (RCM4) is easy to swap out and comes pre-calibrated. With normal use, sensors last about 2 years. Great for chasing down dangerous CO leaks quickly and safely.

🚶 Walk-Around CO Test

• Zero the meter outside (away from any CO source)
• Enter the structure and walk through the space
• Watch the real-time display for CO spikes
• Use MAX mode to find the highest reading zone
• Locate the likely source of the leak

Technical Specifications

• Measurement Range: 0 to 1000 ppm CO
• Sensor: Electrochemical, 3-pin design
• Battery: 9V (included)
• Display: Dual-backlit screen with MAX and live readings
• Auto Power Off: Enabled (can be disa