03-27-2023 09:41 AM
I am new to the BME688 sensor and I need to help to decouple the humidity and gas measurement. When I espose the sensor to solvents (Acetone, IPA or ethanol) the humidity changes in the order of 3-5% that follow the gas concentration, especially with acetone. When I expose the sensor to water I get significant gas resistance variation. I attach the raw data extracted from the BSEC2 library for Arduino IDE 2.0.3.
How can I know if the resistance measurement is due to gas sensing and not variations in humidity and vice versa?
Solved! Go to Solution.
03-27-2023 04:28 PM
Temperature and humidity can have an impact on the gas output of BSEC. They are related, and the BSEC algorithm implements this process internally.
03-27-2023 06:35 PM
Thank you for your answer. Which process does the BSEC implement internally? Do you mean that it takes the impact of temperature and humidity into account to improve the gas measurement?
How about the BME68x library? Does the programmer have any control on the measurement?
03-28-2023 11:51 AM
The BSEC algorithm internally compensates the gas output based on temperature and humidity, and the user can directly use the output of BSEC, but does not disclose the implementation details of the BSEC algorithm.
03-28-2023 03:07 PM
Thanks for the answer! It makes sense!
Does the BME68x library (and the examples provided) give the same compensation or is it up to the user to do that?