Articles | Volume 11, issue 1
Atmos. Meas. Tech., 11, 315–328, 2018
https://doi.org/10.5194/amt-11-315-2018
Atmos. Meas. Tech., 11, 315–328, 2018
https://doi.org/10.5194/amt-11-315-2018

Research article 15 Jan 2018

Research article | 15 Jan 2018

Calibration and assessment of electrochemical air quality sensors by co-location with regulatory-grade instruments

David H. Hagan et al.

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Short summary
The use of low-cost sensors for air pollution research has outpaced our understanding of their capabilities and limitations under real-world conditions. Here we describe the deployment, calibration and evaluation of electrochemical sensors on the Island of Hawai‘i. We obtain excellent performance (RMSE < 7 ppb, r2 = 0.997) across a wide dynamic range (1 ppb–2 ppm). We introduce a hybrid regression algorithm which works across a large dynamic range and shows little decay in sensitivity over time.