We use the Plantower PMS5003 sensor for PM2.5. This sensor has been extensively tested and is one of the most accurate low cost sensors. All low cost sensors a

We use the Plantower PMS5003 sensor for PM2.5. This sensor has been extensively tested and is one of the most accurate low cost sensors. All low cost sensors are using the laser scattering technique and thus do approximate the mass and not a direct measurement. However tests show that PM2.5 is the most accurate and often PM10 in these sensors is not very good.