I'm wondering what options I have to protect the BME688 from potential moisture ingress without affecting the sensor's ability to detect VOCs and VSCs.
I'm not looking to make it IPX7, but our application puts the sensor in a very humid environment, and I don't want to contaminate the sensor.
I've seen mention of using PTFE membranes with other sensors, particularly the BME280, but I haven't seen anything specifically relating to the gas sensors.
The main reason to use the BME688 is gas detection, so I don't want to impede the sensor's functionality.
You need to evaluate whether there will be water droplets entering the sensor opening in your usage environment as you mentioned "our application puts the sensor in a very humid environment". If so, it is usually necessary to add a waterproof membrane. Choose a suitable waterproof membrane that will not affect gas detection.