Sonic Sifters use acoustic energy to create a vertical column of air for continuous agitation and add vertical or alternating vertical/horizontal tapping to assist in deagglomerating samples with hygroscopic, electrostatic or other adhesion issues.
Acoustic/tapping agitation provides rapid sample separation with minimal cloth wear. 3,600 sonic energy pulses per minute oscillate an air column through the sieve apertures of up to seven 3in or 8in (203mm) full-height sieves for sizing of small samples with particle sizes down to 5µm.
An internal microprocessor provides precise control of the oscillation amplitude and a ten program memory accommodates materials with different densities/textures and ensures repeatable results. Each program memory has three timed segments consisting of ramp-up time to desired maximum amplitude, maximum amplitude hold time, and ramp-down to zero amplitude. Tapping duration and positioning is also user-defined.
The Sonic Sifter sieving action, which can be varied for different densities and textures of material, is unique. A vertical column of air is created to oscillate through a sieve or set of sieves. The motion of the air alternately lifts the sample and then assists it through the sieve apertures. The oscillation amplitude is variable.
A vertical mechanical pulse may also be applied to the sieves at regular intervals to break down any clustered particles and help eliminate any blinding of the apertures.
An important feature of the Sonic Sifter is that it causes very little attrition of the sample and virtually no screen wear.