Nitrogen dioxide is the marker of combustion indoors — gas cooktops, unvented heaters and attached garages. It's odorless at the levels that matter, so a laboratory badge measures it instead: no pump, no power, no guesswork.
Nitrogen dioxide is produced whenever fuel burns indoors — gas cooktops and ovens, unvented gas or kerosene heaters, and fumes drifting in from an attached garage are the common household sources. It's a respiratory irritant: sustained exposure is associated with aggravated asthma and reduced lung function, and children in homes with gas cooking are the most studied group.
The reason it needs measuring is that at the concentrations that matter indoors it gives no reliable smell or visible cue — so the only way to know whether your kitchen or a room off the garage is carrying elevated NO₂ is to quantify it. Every result is reported as a named, measured concentration, not folded into an air-quality score.
Choose the room — the kitchen near a gas cooktop, a room heated by an unvented appliance, or a room sharing a wall with an attached garage is usually the most informative. Open the sealed pouch and immediately write down the exact start time. Place the badge at breathing height (3–5 ft), in the middle of the room, away from vents, windows, purifiers and direct sun.
Leave it undisturbed for 8 to 12 hours — cook, heat and ventilate the space as you normally would. Seal it back in the pouch, record the end time, and post it the same day. Return within 14 days of use.
The badge captures nitrogen dioxide onto a chemically treated collection medium as it diffuses in, converting it to nitrite. At the laboratory the medium is extracted into solution and the nitrite is measured by ion chromatography, which separates ions on an analytical column and quantifies them.
Because the badge's uptake rate is characterised, the mass recovered converts into a time-weighted average concentration for the period you recorded.
Independently operated, with no ties to filter, purifier or remediation companies. Every badge is analyzed by an accredited laboratory under a named, validated method, with a documented chain of custody — and your data is yours.
Order today, expose the badge at home, and mail it back in the prepaid mailer.
For informational & screening purposes. This is a laboratory analysis of the air sampled — not a medical diagnosis.