Dyson's new air purifier shows how much formaldehyde it's trying to destroy

The new Dyson Purifier Formaldehyde air purifiers — Hot+Cool (HP09) and Cool (TP09) — are able to distinguish formaldehyde from other VOCs using a dedicated solid-state formaldehyde sensor, in order to better monitor the carcinogenic gas constantly released from the likes of furniture, carpets, paint and flooring.

source https://www.engadget.com/dyson-purifier-formaldehyde-hp09-tp09-085614860.html