The Dust Sentry is a modular air quality monitoring instrument for the measurement and compliance of specific dust and particulate designation. It provides real-time particulate measurement of PM10 using a well proven near forward light scattering nephelometer and a high precision sharp cut cyclone. 

The nephelometer is an optical sensor that uses light scattering from particulate matter to provide a continuous real-time measurement of airborne particle mass. The light source is a visible laser diode and scattered light is measured in the near forward angle using focusing optics and a photodiode. The nephelometer has an on-board temperature sensor which corrects for thermal drift, sheath air filter to keep the optics clean and automatic baseline drift correction.

The sharp cut cyclone is a precision engineered component fitted to the dust meter inlet that physically selects particles 10 microns in diameter and below. This ensures precise measurement of only the PM10 size fraction. The inlet is fitted with a heater that is used to remove moisture from the incoming sample. Moisture can reduce the accuracy of optical measurement, so for best results the inlet heater is activated in the event of high humidity.

Packaged in a robust weather-proof, lockable enclosure, the Dust Sentry is light enough for one-person site installations. Integrated solar shielding prevents the enclosure from overheating in climates with high solar irradiance. Options to integrate environmental sensors, such as wind, noise, weather and solar radiation make this a complete air monitoring solution for your project.