03-03-2017, 03:55 AM
i am progressing slowly with understanding how to use this sensor, but it is quite weird
since the output depends to some level on temperature and humidity, compared to the optical CO2 based sensors, you cannot just put it outside and compare to the inside values (especially where there are 15 degrees difference)
So it took me almost a week of testing before i realize something quite weird
the chart below shows what happens when i open the door (going down, close it, going up, then again open and close it)
there is a 15% difference in the output
And this all happens in an isolated room where the CO2 ppm is ~420-430, temperature is 22 degrees (an additional heater works, so that there is no diffrence when i open the door)
Which shows that using the voc sensor you can measure even beyond what the CO2 sensor measures (e.g. even cleaner air)
![[Image: Capture.png]](http://vair-monitor.com/wp-content/uploads/2017/03/Capture.png)
since the output depends to some level on temperature and humidity, compared to the optical CO2 based sensors, you cannot just put it outside and compare to the inside values (especially where there are 15 degrees difference)
So it took me almost a week of testing before i realize something quite weird
the chart below shows what happens when i open the door (going down, close it, going up, then again open and close it)
there is a 15% difference in the output
And this all happens in an isolated room where the CO2 ppm is ~420-430, temperature is 22 degrees (an additional heater works, so that there is no diffrence when i open the door)
Which shows that using the voc sensor you can measure even beyond what the CO2 sensor measures (e.g. even cleaner air)