Can individual sensors be replaced or added?

Most sensors are socketed and can be replaced if they become defective or reach the end of their service life. In this case, the air-Q will show a notice in the app or on the device itself.

Depending on the version, the air-Q has one or more free slots for additional sensors. For example, you could add a sensor for ultrafine particles or methane. All currently available additional sensors can be found at https://shop.air-q.com/