Low cost Particulate Matter air quality sensors

A third-party evaluation of Alphasense’s low-cost particulate matter (PM) air quality sensors has demonstrated good correlation with reference instruments at a fraction of their cost. Weighing less than 30g and with 72mm as its longest dimension, the OPC-R2 (optical particle counter) offers impressive performance for such a small sensor. A laser is utilised to detect particles from 0.30 to12.4 μm in diameter with 16 software ‘bins’. Count measurements are converted into mass concentrations of PM1.0, PM2.5and PM10using embedded algorithms. The sensor also measures temperature and relative humidity. All Alphasense sensors are factory calibrated prior to dispatch. For more information and to view the sensors in person, visit stand I16 at the AQE/WWEM exhibition. Alphasense will be exhibiting the OPC-R2 and OPC-N3 air quality sensors alongside the company’s full range of gas sensors.