Nitrogen Oxides

NO_x

Note that most pods do not contain NO_x sensors as of 2021, but they are available upon request.

This measurement refers to the NO and NO₂ levels in the air, both of which are toxic.  Indoors, these compounds primarily result from combustion reactions (gas stoves, gas heaters, tobacco smoke).  Outdoors, NO and NO₂ come primarily from emissions (car exhaust, or industry).  They pose a threat to human health both in their NO and NO₂ forms, and because NO₂ is a contributor to ozone production. Nitrogen dioxide is formed at high temperatures as N₂ is broken up in the air. ​

Learn more about nitrogen oxides

Sources:

• EPA Environmental Protection Agency
• NO_x Diagram