SCD40 CO2 Module

It does what it says, a bit over priced and my needed a huge offset

Aside from the shipping issues unrelated to the sensor, the tiny sensor is a bit overpriced for what it is, specially since we already over paid for the main sensor. The two data points that the sensor provides were widely off and needed to have an offset (talking -30 degrees F) applied. Thankfully Apollo has provided the variables to do that. For the cost I expected a better result.

It's bulky, especially with the ceiling mount

Don't want this into my ceiling, it's to big and does not look beautiful. Too nerdy. Because of that I didn't test the hardware itself out. Love the idea, but design is definitely not great.

Easy Replacement In Apollo AIR-1

The data from the CO2 sensor in my Apollo AIR-1 became very noisy, like +/-100 kind of noisy. I tried a number of things to resolve it, to no avail. So I ordered a new SCD40 module for it. It took about 60 seconds to open the AIR-1, unplug the old module, plug in the new one, and close it up again. After running the sensor for an hour and a half outside, I recalibrated to CO2 reading. Back inside, the data quality is back to what it was before the original sensor went bad.