We are working on test different sensors, because the first Honeywell sensor that we had it has some stability and electric noise issues.

We can know some alternatives, for example using a Panasonic sensor, in the next guides:

https://www.hackster.io/canairio/build-a-low-cost-air-quality-sensor-with-canairio-v2-1-d87494

And with 3d print box:

https://github.com/hpsaturn/CanAirIO