https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_S5P_OFFL_L3_HCHO?authuser=1
OFFL/L3_HCHO This dataset provides offline high-resolution imagery of atmospheric formaldehyde (HCHO) concentrations. Formaldehyde is an intermediate gas in...
earth enginedata catalogsentinelhchooffline
https://www.dfrobot.com/product-1574.html
Formaldehyde (HCHO) sensor is an Arduino & Raspberry Pi compatible module, which is the ideal solution for indoor air quality monitor.
hcho sensorgravityformaldehydedfrobot
https://h2co.aeronomy.be/
hcho