Hi Oseania, As you know by now, the resistance decreases in presence of pollutants, and increases in clean air. 13007335 is the maximum resistance that can be measured by the sensor. Heating/cooling cycle used has a big impact on the baseline of the gas resistance in the environment. I do not think that the sensor is really damaged by this cycle, but simply that extended heating duration makes the baseline exceed the limits of the ADC. You can solve this be either: 1- Adjusting your heating cycle 2- Placing the sensor in air that contains more pollutants I imagine that option 1) is more practical. Again I would give you the same advice as handytech and suggest that you consider using the BSEC library. Bosch Sensortec has characterized the sensor and developed 2 working modes for indoor air quality sensing using the BME680 (data rates 1/3 and 1/300 Hz). If you really want to develop your own working mode, I would suggest that you start with the heating cycle of BSEC closest to your desired application, and go from there. o_o
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