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Acoustic spectrometer measures attenuation of
ultrasound for a set of frequencies, typically from 1 to 100 MHz. This
ultrasound attenuation frequency spectra contains information on particle size
distribution. Software performs fitting searching procedure for particle size
distribution that provides the best fit to the experimental data. This software
is based on well developed and verified theory,
see
Acoustic
theory and
ISO
Standard 20998-1:2006"Measurement
and characterization of particles by acoustic methods --
Part 1: Concepts and procedures in ultrasonic attenuation
spectroscopy".
Measurement method is transmission pulse technique.
Sensor contains two piezo - crystals with parallel face surfaces. One is
transmitter, the other is receiver. Gap between transmitter and receiver is
movable. Default setup includes measurement at 21 gaps and 18 frequencies. Such
measurement takes about 5 minutes. Automatic averaging of large number of pulses
collected at each gap and each frequency allows conducting measurement at the
wide frequency range with high precision, 0.01 dB/cm/MHz.
There are multiple examples of using this device for particle sizing in very
complex systems given in
Newsletters and
Applications by
customers of our instruments.
DT-100 can be supplemented with a set of
Options, which substantially extend this
instrument capabilities.
DT-1201 has a very flexible sample handling system that we
have developed dealing with complex concentrated systems during 15 years. This
flexibility has been achieved with a set of standard (included) and optional
(purchased)
Accessories. Minimum
sample volume is 15 ml.
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