testo 315-3 with Bluetooth - CO and CO2 meter for ambient measurements

Order-Nr.  0632 3154

  • High-precision electrochemical CO sensor, shock resistant infrared CO2 sensor

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

  • Rugged design

  • TÜV certified according to DIN EN 50543 standard

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Product Description

Cutting-edge technology, easy-to-use, rugged design. These are just a few of the features which make the testo 315-3 stand out head and shoulders above the rest. The CO and CO2 meter 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.

The intelligently designed meter has an energy-saving lithium polymer rechargeable battery and powers off automatically when not in use.

And here’s yet another practical feature: the CO and CO2 meter for ambient measurements can also be used in combination with the testo 330-2 flue gas analyzer. The CO/CO2 readings can be transferred directly to the analyzer via Bluetooth.

Tune up your CO and CO2 meter with a range of accessories for even more possibilities

Your testo 315-3 is already well equipped to meet all the demands you would put on a CO and CO2 meter. The following accessories are designed to allow you to customize your meter to suit your own individual requirements:
  • TopSafe protective casing: water and dirt repellent; provides your testo 315-3 CO and CO2 meter with protection in wet and dirty conditions
  • Testo turbo printer: The testo turbo printer enables you to print out on site and provide your customers with the necessary documentation. The results are transferred to the printer via Bluetooth
  • Temperature/humidity module: allows you to carry out quick and reliable temperature and humidity measurements

Delivery Scope

CO and CO2 meter with Bluetooth for ambient air measurements, USB power adaptor, cable.

Technical Data

Attachable humidity module - Capacitive

Measuring range

+5 to +95 %RH


±2.5 %RH (5 to +95 %RH)


0.1 %RH

Ambient CO₂

Measuring range

0 to 10000 ppm


±300 ppm (0 to 4000 ppm)

±8 % of mv (4000 to 6000 ppm)

±500 ppm (6000 to 10000 ppm)


10 ppm

Ambient CO

Measuring range

0 to 100 ppm


±3 ppm (0 to 20 ppm)

±5 ppm (>20 ppm)


0.5 ppm


Measuring range

-10 to +60 °C


±0.5 °C (±1 Digit)


0.1 °C

General technical data

Operating humidity

0 to 95 %RH


200 g


190 x 65 x 40 mm

Operating temperature

0 to +40 °C

Protection class

IP40 acc. to EN 60529


According to EN 50543




IRDA / optional Bluetooth

Storage battery type

Lithium polymer rechargeable battery

Battery life

10 h measurement time (at +20 °C/+68 °F) / Mains operation possible

Battery charging option

In instrument via mains unit

Storage temperature

-20 to +60 °C




Order Number: 0516 0191

testo fast printer IRDA

Order Number: 0554 0549

USB mains unit incl. cable

Order Number: 0554 1105