Testo 317-3 Portable Ambient CO Monitor

0632 3173
0632 3173
Minimum Purchase:
1 unit
  • Testo 317-3 Portable Ambient CO Monitor
  • Testo 317-3 Portable Ambient CO Monitor
MSRP: $280.00
Price: $238.00
— You save $42.00


Testo 317-3 Portable Ambient CO Monitor

The testo 317-3 ambient CO meter detects the presence of carbon monoxide (CO) in ambient air, and warns the user if potentially harmful CO concentrations are reached. With programmable settings for both visual and audible alarms, as well as hands free operation, ambient CO testing during furnace and boiler service and maintenance, weatherization audits, or home inspections has never been easier.

The testo 317-3 ambient CO meter provides fast and easy CO testing with a small, lightweight form factor. An exclusive self-test mode provides worry-free operation, as it will always verify that the CO sensor is functioning, anytime and anywhere, without the need for test gas. In addition, the self-check will ensure accurate CO measurements, without the need to "zero" out the unit in a fresh air environment.


  • Ready to go: no zero phase
  • Alarm with adjustable thresholds
  • Compact design with belt clip for hands free operation
  • Programmable high and low alarm options
  • Earphone jack, and earbuds for loud environments
  • 3-year CO sensor warranty


Ambient CO
Measuring range 0 to +1999 ppm
Accuracy ±3 ppm (0 to +29 ppm)
±10 % (+30 to +1999 ppm)
Resolution 1 ppm
Operating temperature 23° to 113 °F / -5 to +45 °C
Battery type 2 AAA batteries
Battery life 150 h (with beeper switched off)
Storage temperature -4° to 113 °F / -20 to +45 °C


  • (1) Testo 317-3 ambient CO meter
  • (1) Soft case with belt clip
  • (1) Hand strap
  • (1) Earbuds
  • (2) AA batteries
  • (1) Manual



Data Sheet

Data Sheet

Product Manual

Product Manual

Software / App

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