Control CO2 Construction kit
(CO2, temperature and relative humidity sensor)

56,02 VAT excl.67,79 incl. VAT)

Make your own CO2, temperature and relative humidity sensor.


Build your own CO2 sensor V2

New in version 2: temperature and relative humidity sensors, NDIR CO2 sensor with a range of 400 to 5000 ppm (instead of 400 to 2000 ppm in the previous version).

This kit contains a blue printed circuit board (PCB), NDIR CO2 sensor, temperature and relative humidity sensor, display board and all necessary connectors.
All you need is a soldering iron, solder, some time and enthusiasm.

This building kit contains no USB-C cable or USB adapter. If necessary, you must order these separately.

If you want us to solder the kit beforehand, order the Assembly Add-on (1 per kit), so you don't have any extra work.

You can 3D print a housing yourself.

You can put the software on the board yourself, here is the code.

PS: there is also a version without temperature and humidity sensor. This one is cheaper and can be here find.

Are you interested in a CO2 STEM teaching package? Then order your CO2 meter(s) and STEM bundle via TESS!

Leave the CO2 sensor on continuously, the first 1 to 8 days after start-up it will do a self-calibration and the values may not be correct. At least once a week (and better every day) the sensor needs to "see" at least 1 hour of fresh outside air to be able to recalibrate itself every week. So ventilate your room every day!

P.S.: Commercially available CO2 meters with a real NDIR CO2 sensor often cost more than 150 to 250 euros. This open-source project has been able to count on the efforts of the Makers-community, which enabled us to keep the price as low as possible, for a real NDIR sensor. In the same price range on the commercial market you will only find worthless VOC sensors, or fake NDIR.

Additional information

Weight 0.1 kg
Dimensions 11 × 8 × 2 cm