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.
- Three year CO sensor warranty
- Adjustable alarm threshold
- Programmable high and low alarm options
- Earphone jack, and earbuds for loud environments
- Hands free operation with belt clip soft case
