This is a really cool idea. As a business owner I would never buy the DIY kit, I would want it fully assembled and have an appropriate warranty, factory testin

This is a really cool idea. As a business owner I would never buy the DIY kit, I would want it fully assembled and have an appropriate warranty, factory testing/calibration and fast replacement - doubly so if I needed the sensor data for compliance or safety reasons. However as a tinkerer I probably wouldn't buy a $200 air sensor... but $70 and get a bit of a project out of it? Sure! Perfect example of broadening reach without cannibalising core business IMO.