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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/ Broschure 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”.
Der Autotitrator passend zu DT-100/110/300/310/1202 und /1210 ist ein ideales Tool zur Bestimmung der Partikelgröße und/oder des Zetapotentials als Funktion des pH-Wertes oder einer definierten Menge Additiv. Er ist ausgestattet mit zwei Hochpräzisions-Titrationspumpen, die softwaregesteuert ein vorher definiertes Titrationsprotokoll durchführen. Es sind sowohl niedrig- als auch hochviskose (> 3000 cp) Titranten einsetzbar.
This probe suitable for DT-100/110/300/310/330/1202 and /1210 is perfect for automatically measuring the electrical conductivity of aqueous liquids and dispersions. It is connected directly to the control box of the measuring device and controlled via its software (no stand-alone measuring device).
This stand-alone measuring probe is perfectly suited for the automatic measurement of the electrical conductivity of organic liquids and dispersions. It is available as a stand-alone measuring device (DT-700).
This unit suitable for DT-100/110/1202/1210 consists of a manually operated peristaltic pump, lifting platform, tubing suitable for the suspension and three-way stopcock. It is ideally suited for particle size measurement of sedimenting or highly viscous samples, also in conjunction with titration experiments, to ensure optimum mixing.
This option suitable for DT-100/110/1202/1210 consists of either an oven (RT – 50°C) or refrigerator (approx. 7°C – RT) to measure the sample at the desired temperature (approx. 7° – 50°C) with regard to particle size distribution.
| DT-1202 | Acoustic attenuation spectroscopy 5 nm – 1,000 µm |
| Bettersizer S3 Serie | Laser diffraction and dynamic image analysis 0.01 – 3,500 µm |
| Bettersizer 2600 | Laser diffraction 0.02 – 2,600 µm |
| Bettersizer ST | Laser diffraction 0.1 – 1,000 µm |
| BeNano Serie | Dynamic Light Scattering 0.3 nm – 15 µm |
| BeVision D2 | Dynamic image analysis 2 µm – 10,000 µm |
