UHSAS

UHSAS – Ultra High Sensitivity Aerosol Spectrometer

• Optically measures aerosols in the size range 60 nm < Dp< 1 µm

• Size resolution at 1-2% of particle size, able to resolve and calibrate for multiple charging in SMPS systems.

• Eliminates sizing uncertainty associated with scattering spectrometers that measure at sizes larger than the excitation wavelength.

• Particles size distributions collected in up to 100 size bins

• Can output size distributions at rates up to 10 Hz

• Able to count up to 3,000 particles/second

• Uses two detection systems: a primary, highly sensitive Avalanche Photo-detector (APD)-based system to size smaller particles, and a secondary PIN photodiode system to size larger particles

• Compensates for small drifts in laser power via an automatic gain control.