By means of the acoustic spectrometer DT-100 and DT-110 the particle size distribution of liquid, concentrated dispersions in its original state can be measured. The system is using the latest theories, the size range is 5 nm to 1000 µm.
These acoustic spectrometers are measuring the sound speed and the attenuation of short ultrasound pulses for a set of frequencies, typically from 1 to 100 MHz (“transmission pulse technique” or “tone burst method”). The data will be recorded at different gaps between ultrasound sender and detector to improve the accuracy of the signals. Due to the wide frequency range of this unique technique, very small (< 100 nm) as well as coarse particles (>> 10 µm). can be measured with high precision. The variable gap between sender and detector enables the characterization of diluted (< 1 Vol.-%) and concentrated (up to 50 vol.-%) dispersions. The Windows-based software takes into account the different ultrasound-wave-particle interactions as scattering, viscous losses and thermodynamic effects.
/1/ ISO 20998-1 Measurement and characterization of particles by acoustic methods.
/2/ A. Dukhin, P. Goetz: Characterization of Liquids, Nano- and Microparticulates, and Porous Bodies using Ultrasound. 2nd Edition. Oxford: Elsevier, 2010.
/3/ PARTICLE WORLD 19; p. 18 – 19; “Characterization of liquids, dispersions, emulsions and porous materials using ultrasound”.
This software-controlled unit is designed to enable the particle size and zeta potential measurement independent of the pH or the amount of an additive. The system can be programmed to carry out automatically different types of protocols (dosing amount of additive/acid/base, pH-value and time).
Two different probes are available to measure the electric conductivity. Both are fully integrated in the DT-software:
|DT-1202||Acoustic attenuation spectroscopy 5 nm – 1,000 µm|
|Bettersizer S3 series||Static light scattering and dynamic image analysis 0.01 – 3,500 µm|
|Bettersizer 2600||Static light scattering 0.02 – 2,600 µm|
|Bettersizer ST||Static Light Scattering 0.1 – 1,000 µm|
|BeNano series||Dynamic Light Scattering 0.3 nm – 15 µm|
|BeVision D2||Dynamic image analysis 2 µm – 10,000 µm|