The TSI 3091 Fast Mobility Particle Sizer Spectrometer spectrometer measures particles in the range from 5.6 to 560 nm, offering a total of 32 channels of resolution (16 channels per decade). It uses an electrical mobility measurement technique similar to that used in the SMPS. However, instead of a CPC, the 3091 uses multiple, low-noise electrometers for particle detection. This produces particle-size-distribution measurements with one-second resolution, providing the ability to visualise particle events and changes in particle size distribution in real time.
The FMPS spectrometer operates at a high flow rate (10 L/min) to minimise diffusion losses of ultrafine and nanoparticles. It operates at ambient pressure to prevent evaporation of volatile particles, and it requires no consumables.
These particle sizers are easy to transport, set up, and operate. Equipment be configured to measure single or multiple runs continuously for up to 12 hours in length. Its large, colour VGA display and built-in control knob provide easy access to instrument features, set-up menus, and data displays.