Scattered-light aerosol spectrometer system with two sensors for real-time simultaneous measurement

The Promo^® Dual operates on the principle of 90° scattered-light detection and supplies two independent sensors with light from a common high-luminance white-light LED source in real time—without optical fiber splitting. Particles are guided individually through a defined measurement volume and illuminated; the scattered light is detected by a photomultiplier and converted into an electrical signal.

The patented T-aperture eliminates edge-zone errors and detects and corrects coincidences in the individual signal. The unique calibration curve of the white light source enables precise size assignment across the entire measurement range. Data from both channels is acquired and recorded simultaneously, enabling direct evaluation of the separation efficiency and particle size distribution in real time.

Extensions

Promo^® Aerosol Sensor 2070: dp ≈ 0.2–40 µm | C_{N max} ≈ 10⁶ particles/cm³

Promo^® Aerosol Sensor 2100: dp ≈ 0.2–40 µm |CN max ≈ 5 * 10⁵ particles/cm³

Promo^® Aerosol Sensor 2300: dp ≈ 0.2–105 µm |CN max ≈ 4 * 10⁴ particles/cm³

Promo^® Aerosol Sensor 2500: dp ≈ 0.3–105 µm | CN max ≈ 4 * 10³ particles/cm³

Promo^® Aerosol Sensor 2xx0 P: pressure resistant < 14 bar overpressure | process temperature -20 °C–+150 °C

Promo^® Aerosol Sensor 2xx0 HP: pressure resistant < 14 bar overpressure | T ≤ +250 °C | process temperature -20 °C–+250 °C