4 ms·
yah, i think a lot of these IAQ (indoor air quality) products are ok at relative differences (which is mostly what lay consumers care about). the article mainly
by clairity 4y ago
yah, i think a lot of these IAQ (indoor air quality) products are ok at relative differences (which is mostly what lay consumers care about). the article mainly points out that they're not good at absolute measurements, and for something like VOCs, it's likely using a CO₂ sensor and a lookup table that's static and only really valid for the test room it was created in.
- Majromax 4y ago> for something like VOCs, it's likely using a CO₂ sensor and a lookup table that's static and only really valid for the test room it was created in. It's the other way around, usually. CO₂ is more typically the estimated value, since its direct detection involves a relatively expensive NDIR value. VOCs as a category need some sort of modeling and estimation, but sensors can go fairly far by directly measuring a few species (hydrogen, for example), and hoping.
- clairity 4y agooh, right, dunno where that brain fart came from... thanks for the correction!