Deutsch
English
DT-100 and DT-110 are particle size measuring devices that work on the basis of acoustic spectrometry or sound attenuation spectrometry (ISO 20998-1). In principle, the dispersion to be characterized between an ultrasonic sender and detector is measured in 180° transmission with regard to ultrasonic attenuation within a sound frequency spectrum of 1-100 MHz. The particle size distribution is then calculated from the measured attenuation spectrum.
A special feature of the DT acoustic spectrometers is the multigap technique, i.e. the spectrum is measured at several sender-detector distances in order to obtain more accurate measurement data and also to cover the widest possible concentration range (0.1 – 60 vol.%). DT-100/DT-110 are therefore predestined for characterizing originally concentrated suspensions, emulsions or even pastes.
DT-100 has a rigid measuring chamber that is resistant to almost all solvents and requires a minimum sample volume of 15 ml (in the case of a sample that is stable over the measuring cycle, i.e. no stirring or pumping is required). If the sample tends to destabilize, either the device’s integrated magnetic stirrer or, for higher viscosity systems, a peristaltic pump with a correspondingly larger sample volume (> 70 ml) can be used.
DT-110 is the small-volume version of the DT-100: equipped with a flexible silicone measuring cell that is easy to remove, it only requires a volume of approx. 5 ml for stable samples. The use of a peristaltic pump (volume approx. 20-25 ml) is also possible for unstable systems. In addition, the measuring cell is very easy to fill and clean and is therefore ideal for paste-like systems such as battery or color slurries.
| DT-100 Acoustic attenuation, Particle size | DT-110 Acoustic attenuation, Particle size | |
| Measured and calculated parameters | ||
| Particle size [µm] | 0.001 – 1000 | 0.001 – 1000 |
| pH | 0.5-13.5 ± 0.1 | 0.5-13.5 ± 0.1 |
| Electric conductivity [S/m]1 | 10-11-101 ± 1% OP | 10-11-101 ± 1% OP |
| Temperature [°C]2 | 0-100 ± 0.1% | 0-100 ± 0.1% |
| Sound speed [m/sec] | 500-3000 ± 0.1% | 500-3000 ± 0.1% |
| Frequency range [MHz] | 1 – 100 | 1 – 100 |
| porosity [%] | 1-99 OP | 1-99 OP |
| Measurement time | ||
| For particle size [min] | 1 – 10 | 1 – 10 |
| Sample requirements | ||
| Sample volume [ml] | ≥ 15 | ≥ 5 |
| Concentration [vol.-%] | 0.1 – 60 | 0.1 – 60 |
| Temperature [°C] | 7 – 50 | 7 – 50 |
| Viscosity of medium and colloid [cp] | ≤ 20000 | ≤ 20000 |
1only in combination with DT-700
2 Temperature probe can measure up to 100°C, permissible dispersion temperature in the device ≥ 7°C and ≤ 50°C
/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/ Broshure DT-Series: Particle size and zeta potential using acoustic and electroacoustic Spectrometry
/4/ 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:
The probe for measurements in organic solvents is also available as a separate device: DT-700.
| 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 |
