Testo 317-3 Ambient CO Meter
by Testo
Last updated Mar 29, 2026 · 2 revisions
Highly sensitive ambient CO detector with adjustable alarms and up to 1,999 ppm measurement range for HVAC gas leak detection and safety.
6.1 - Good Custom · $270 7 Features
3 Integrations
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www.testo.com
About This Product
The Testo 317-3 is a portable ambient CO meter with an extremely sensitive electrochemical sensor measuring carbon monoxide up to 1,999 ppm. It features adjustable audible and visual alarm thresholds for customized safety monitoring around gas appliances and heating systems. The compact design with belt clip makes it ideal for HVAC technicians performing walk-around CO safety checks in mechanical rooms, boiler plants, and residential basements.
FSH Score Breakdown
Ease of Use 8.0
Features 6.0
Support 7.5
Value 7.5
Integrations 3.0
AI Capabilities 0.5
Customer Reviews
Features
7 features confirmed across
4categories· Showing confirmed capabilities only
Equipment & Asset Management3features
AlertsAdjustable alarm thresholdSelf-Diagnostic ModeSelf-test modeLong-Term Environmental Measurement
Hardware Features2features
Touchscreen DisplayBacklit displaySensor LongevitySelf-test mode without test gas
Mobile & Field Tools1feature
Bluetooth Probe Integration
Compliance & Safety1feature
Airflow Calculations
Integrations 3 across 1 category
Industry-Specific 3
Fluke Connect
HOBOConnect
Testo Native
Pricing
- Model
- Custom
- Starting at
- $270
- Notes
- Street price ~$270 USD (Test Equipment Depot). Portable ambient CO meter for detecting carbon monoxide in ambient air with programmable visual and audible alarms. CO range: 0-1,999 ppm. Accuracy: +/-3 ppm (0-29 ppm), +/-10% (30-1,999 ppm). Operating temp: 23-113F (-5 to +45C). Battery: 2 AAA, 150h life (beeper off). Dimensions: 7.5 x 2.56 x 1.58 in (190 x 65 x 40 mm). Exclusive self-test mode verifies sensor function without test gas. Hands-free operation. Includes protective soft case with belt clip, hand strap, earbuds, 2 AAA batteries, instruction manual.
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