SALE! vAir - CO2 Monitor (NON NDIR Sesnor)

Multiple customization options available
I am currently out of enclosures for those devices and i need some time to print new ones. If you want one of those - drop me a note!

Selecting the CO2 Sensor type:

The device comes with two kinds of CO2 Sensors. The default (cheaper) is an Electro-Chemical sensor, which you can change to an IR based Sensor for 20 eur. The notable differences are:
  • Electro-Chemical - Accuracy is +/- 150ppm @ 1000 ppm (15%). The sensor works best if it turned on all the time, as it may need up to two days until it reaches this accuracy. Before this time it would display ~50% higher ppm level. It is also a bit sensitive to temperature so it should not be exposed to direct sunshine, air conditoner or cold weather. The effect would be that it may display less accurate results in those conditions (but would be fine afterwards)
  • IR-based sensor - Accuracy is +/- 50ppm @ 1000 ppm (15%). It needs just 2 minutes until the IR lamp stabilizes and then the readings are accurate
  • Exposure to fresh-air - Both sensors expect to be exposed to fresh air at least 10 minutes each 3 days. The reason is that the sensor needs to compensate for some drift in the internals so the lowest ppm level each 3 days is assumed to be 400 ppm. If this does not suit your application, there are also more advanced dual-chamber sensors available which do self-calibration. Contact us for a quote on this


This is an affordable CO2 Monitor that focuses on simple visualization and low price. The main goal is to allow a broader set of people to get a chance to measure their Indoor CO2 Levels and adjust their habits towards breathing healthier and cleaner air


Carbon Dioxide is only 0.04% (400 parts-per-million (ppm)) of the outside air (compared to ~20% for Oxygen). Humans are very sensitive to CO2 and the standard for safe working environment is 0.5% (5000 ppm) for 8 hours work day. Yet recent studies found out that even at levels ~0.2% (2000 ppm) the brain starts to limit some functions. Those are particularly the ones required in most modern jobs – Decision Making, Innovative Thinking, Proactiveness. A notable side-effect is also head-ache, tiredness and others. Sleeping at increased CO2 levels (>2000 ppm) is also linked to bad sleep and ineffective rest during the night.


The concentration of 2000 ppm is reached within few hours in a closed room. It is not that high that one would start to search for fresh air immediately. But the adverse effects already start playing their role. This is why many companies employ CO2 Monitors either in the rooms so that people can monitor and take action. Or they take ventilation systems with built in CO2 monitoring, that decides whether or not to let fresh air in the room.


While designing the vAir – CO2 Monitor few key aspects were targeted, with the ambition to put an innovative device on the market:
  • Ergonomic Design suitable equally suitable for Offices, Living and/or Bed rooms – The 3D Printed White box has 6 Colorful LEDs that aid in the visual perception of the CO2 level. Their brightness is automatically adjusted to match the ambient light so it works equally well in bright offices as in dark bedrooms. Two USB ports ensure suitable placing arrangement. The optional 0.96” OLED display satisfy the needs for exact numbers
  • Connectivity – With an optional Wifi expansion, data can be pushed to any online service using HTTP or MQTT protocols.
  • Price – While monitoring CO2 can be beneficial it is still a new topic, and the price tag for existing devices on the market is a bit high. A key feature is the multiple optional upgrades offered, so that a multitude of people can find the best device for their needs and pocket.

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