Hi heavyC1oud,
Typically, while heating the gas sensor, depending on how the heater element is duty cycled, the internal temperature of the device increases. Additionally, if you have other heat sources on the PCB like a power management unit or a processor, this could lead to additional temperature increase that is measured at the sensor. This temperature increase also causes the measured relative humidity to drop by a relative amount. The BSEC library, can compensate for the heat generated by the sensor itself, and you can additionally input the expected temperature increase due to other heat sources and the BSEC library will give you the corrected temperature and humidity.
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