MONODISPERSION OF THE INVESTIGATED FLOW IN THE SORTING UNIT OF A PARTICLE-SIZE OPTICAL AND ELECTRICAL ANALYZER

The use of a compact cylindrical piezoelectric transducer in the jet d ispersion unit of the sorting system of an optical or electrical parti cle size analyser is discussed. Solving two equations for the shift di stribution in a piezoelectric transducer with a running fluid chamber, important expressions for the vibrational velocity of acoustic termin al, mechanical impedance, force factor, resonance frequency of dispers ion unit and length of the stable part of the jet are obtained. The pr actical application of this technique is illustrated by the calculatio n of design parameters for an industrial dispersion unit used in an H- 50 cytophotometer (Ortho Instruments, USA). Good agreement between the oretical and experimental results is shown.