Testo, Testo 315-3
Ambient CO-/CO2 Monitor
Testo, Testo 315-3

Testo 315-3 Ambient CO-/CO2 Monitor

Testo 315-3 CO and CO2 monitor is cutting-edge technology, easy-to-use, rugged design. The CO and CO2 monitor is designed to measure carbon monoxide and carbon dioxide parallel in heating systems and ventilation ducts. The readings are presented on an easy-to-read display. A visual and audible alarm are activated when CO/CO2 thresholds are breached. The thresholds can be adjusted to suit your range of applications.

Application: HVAC, greenhouse, landfill gas, ventilation management, Mining, cellar & gas stores, buildings, bus, railway/ airport waiting halls, schools, library, trains, hospitals, office, subway


Tax /GST included

Testo 315-3 CO and CO2 monitor is high-quality, easy-to-use, ruggedly designed CO and CO2 monitor that enables you to carry out quick and reliable ambient measurements.


•  Parallel CO & CO2 measurement

•  Visual and audible alarm when thresholds are breached – adjustable thresholds

•  Extremely robust sensors

•  Conforms to the European Standard EN 50543 and British Standard BS 6173:200

Note: Testo 315-3 CO and CO2 Monitor for ambient measurements can also be used in combination with the testo 330-2 flue gas analyzer. The CO/CO2 reading scan be transferred directly to the analyzer via the meter’s infrared interface.

100 Items

Data sheet

IRDA / optional Bluetooth
Operating Temperature
0 to +40 °C
Operating Humidity
0 to 95 %RH
Relative Humidity
Range: +5 to +95 %RH, Accuracy: ±2.5 %RH, Resolution: 0.1 %RH
Storage Temperature
-20 to +60 °C
According to EN 50543
Range: -10 to +60 °C, Accuracy: ±0.5 °C (±1 Digit), Resolution: 0.1 °C
Battery Life
10 h measurement time (at +20 °C/+68 °F) / Mains operation possible
Protection class
IP40 acc. to EN 60529
190 x 65 x 40 mm
200 g
2 years on the instrument; rechargeable battery: 12 months; CO sensor: 12 months; CO₂ sensor: 12 months
Ambient CO₂
Range:0 to 10000 ppm ; Accuracy: ±300 ppm (0 to 4000 ppm) ; 8 % of mv (4000 to 6000 ppm) ; 500 ppm (6000 to 10000 ppm) ; Resolution: 10 ppm
Ambient CO
Range: 0 to 100 ppm ; Accuracy: ±3 ppm (0 to 20 ppm) ; ±5 ppm (>20 ppm) ; Resolution: 0.5 ppm

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