Finding F-0141

“For PM2.5, the Air Gradient also had relatively high R2 (0.79), moderately strong Pearson correlation (r = 0.69, p\0.05), and a narrow range of LOAs (30.1 mg/m3) and low RMSE (5.8 mg/m3).”

Validating the performance of low-cost IAQ sensors through co-location (2026). J Build Phys. Page 1. CKB 1603

Structure

Factor: Particulate matter (PM₂.₅ and PM₁₀)
Method: Low-cost sensors
Setting: indoor test, CA
Study design: co-location test of two consumer-grade low-cost sensors (Airthings View Plus, Air Gradient Pro) against reference instruments (Graywolf DSII-8 for CO2, Lighthouse Handheld 3016 for PM2.5) with time-series analysis, regression, Bland-Altman and paired t-tests (class 4)
Effect: other 0.79
Averaging time: 5-minute sampling interval
Flags: unit-suspect
Caveat: the text layer prints mg/m3 where the paper means μg/m3 (font substitution); averaging to 30-minute intervals improved accuracy according to the abstract

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.