Low-Cost Sensor Study to Evaluate NO2 Sensors

Submitted by SonomaTechEditor on
Low-Cost Sensor Study to Evaluate NO<sub>2</sub> Sensors
U.S. Environmental Protection Agency
Air agencies and non-governmental organizations need to know the performance capabilities of low-cost sensors. In response, Sonoma Technology evaluated the performance of low-cost NO<sub>2</sub> sensors and assessed their potential usefulness for gradient studies of near-roadway NO<sub>2</sub> concentrations and citizen monitoring of air pollution.<br>

For this evaluation, we developed
<li>Protocols involving the design of environmental testing chambers to hold the experimental sensors (instruments).</li>
<li>Experimental designs for simultaneous measurement of target gases and interference with both reference analyzers and the low-cost instruments.</li>
<li>Unique data acquisition, processing, and analytical protocols.</li>
As part of this study, we explored
<li>Sensor response to NO<sub>2</sub> and ozone.</li>
<li>Cross-sensitivity and relative humidity effects.</li>
<li>Response (such as time lag) to changes in concentration.</li>

Clinton P. MacDonald

Submitted by rspencerdev on
Clinton P. MacDonald
President / Chief Scientist