The Dust Sentry Pro is a real-time multi-channel particle monitor for aerosol profiling. It is designed for those who need to monitor and manage multiple outdoor dust and particle size fractions simultaneously and in real-time. The Dust Sentry Pro delivers simultaneous measurement of PM10, PM2.5, PM1, TSP, and particulate counts for 8 channels: 0.3, 0.5, 0.7, 1.0, 2.0, 3.0, 5.0, 10 microns.

Packaged in a robust weather-proof, lockable enclosure, the Dust Sentry Pro 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.

The Dust Sentry Pro comprises an optical particle counter that converts counts to a mass fraction via a proprietary algorithm stored in the system firmware. Measurements are logged and reported in real-time. The Dust Sentry Pro is configured to display and log particle mass by default. However, there is also an option to configure the instrument to record particle counts.

The particle counter uses scattered light to measure and count particles. Light from a laser diode is collimated to illuminate the aerosol sample flow. When a particle is present it scatters the incident laser light which is detected using a 60 degree solid angle elliptical mirror at right angles to the laser beam. The amount of scattered light is converted to a voltage pulse and the amplitude of the pulse is calibrated to a particle diameter. The particles are thus assigned on the basis of size to one of eight channels. An on-board temperature sensor corrects for thermal drift, and a sheath air filter keeps the optics clean even in harsh environments.