Hi,
Thanks for your inquiry.
In BME680 datasheet the typical IAQ deviation from sensor to sensor is +/-15% +/- 15. The IAQ value [0, 500] is the output of BSEC library. If the reference meter shows IAQ of 200 for example, then the IAQ error from BSEC should be in the range of [-45, +45] which means that the IAQ output of BSEC should be in the range of [155, 245].
The accuracy of bVOC which is another output of BSEC in the range from 0.5ppm to 1000ppm is not defined or specified.
Thanks.
... View more