I have been considering making a CO2 sensor myself using commercially available CO2 detectors [1] , [2] and an Arduino or similar microcontroller, insructions for which abound on the intertubes [3], [4]. Such a device can be made fairly inexpensively.
However, there is a known issue in calibrating the device, as the IR emitter and light sensor change characteristics over time. The calibration requires immersing the device in nitrogen or pure CO2 and is costly and complex. The workaround is to calibrate the device outdoors where there is an assumed 400 ppm CO2.
However, there is a known issue in calibrating the device, as the IR emitter and light sensor change characteristics over time. The calibration requires immersing the device in nitrogen or pure CO2 and is costly and complex. The workaround is to calibrate the device outdoors where there is an assumed 400 ppm CO2.
[1] https://www.co2meter.com/collections/0-1-co2
[2] https://www.epluse.com/en/products/co2-measurement/co2-senso...
[3] https://www.dfrobot.com/blog-70.html
[4] https://www.youtube.com/watch?v=V1uOHOcVZrE