TSI aerodynamic particle sizer

TSI Aerodynamic Particle Sizer APS 335counts and sizes airborne solids and non-volatile liquids at number concentrations up to 600 particles... 

Naqui et. al. [153] describe a phase Doppler technique, for measuring particle velocity and statistcal information about particle size of irregular particles, based on a phase shift signal. The technique works on near back-scatter which leads to a robust set-up under conditions of limited optical access. Preliminary measurements in a crystallizer were presented and good agreement with TSI Aerodynamic particle sizer was found. 

Figure 6.22. The TSI Aerodynamic Particle Sizer Model 3320 measures the velocity of fineparticles passing through a so-called double crested laser beam in order to determine their size from the acceleration they experience at the nozzle. (Larger fineparticles accelerate more slowly and so have a lower velocity.) a) Layout of the TSI Aerodynamic Particle Sizer, b) View of the inspection zone from above, c) Enlarged side view looking into the laser beam.

Another time-of-flight instmment, the Aerodynamic particle sizer (APS), is manufactured by TSI Incorporated (St. Paul, Minnesota). This system operates at subsonic flow conditions and cannot tolerate as high a flux of particles as the AeroSizer. As of 1996, the development of time-of-flight instmments is ongoing. 

Fig. 7 A Doppler-shift procedure for measuring the aerodynamic size of aerosol fine particles is used by the TSI aerosol particle sizer. (From...

Heidenreich and co-workers, have investigated the calibration of an optical stream particle counter using the Aerodynamic Particle Sizer manufactured by TSI Instruments Inc which will be described in the next section [46]. 

Another aerosol spectrometer is manufactured by TSI Incorporated. Their instrument is known as the Aerodynamic Particle Sizer (APS). This system operates at subsonic flow conditions, and has a lower rate of count than the Aerosizer . The performance of the instrument has been documented in various publications [59, 60, 61]. In... 

See Trade literature on the Aerodynamic Powder Sizer (APS Spectrometer) manufactured by TSI Incorporated, Particle Instruments, P. O. Box 64394, St. Paul, MN, USA 55164. 

---