DT-600 Acoustic rheometer

Basic Models with additional OPTIONS and ACCESSORIES. Download BROCHURES.

DT-600 – Acoustic Rheometer longitudinal

This longitudinal Acoustic Rheometer instrument characterizes visco-elastic properties of Newtonian and non-Newtonian liquids of any composition while treating them as homogeneous.

Acoustic rheometer
Acoustic rheometer

Several published papers present longitudinal rheology measurements for variety liquids:

  1. Dukhin, A.S. and Goetz, P.J. Bulk viscosity and compressibility measurement using acoustic spectroscopy,” The Journal of Chemical Physics, Vol.130, Issue 12, (2009).
  2. Dukhin A.S., “Rheology in longitudinal (ultrasound) mode. Review”, Colloid Journal, vol 83, 1, pp. 1-19, (2021)
  3. Dukhin, A., Parlia, S., Somasundaran, P., “Rheology of non-Newtonian liquid mixtures and the role of molecular chain length.” J. of Colloid and Interface Science. (2019)

Transmitting piezo-crystal launches ultrasound pulses into the sample while automatically adjusting signal to noise ratio. These ultrasound pulses exert longitudinal stress when propagating through the sample. Visco-elastic response from the liquid reduces magnitude of the pulse and affects speed of the pulse propagation while frequency of ultrasound changes from 1 to 100 Mhz . Subsequently, receiving transducer receives weaker ultrasound pulse, converts it to electric pulse and sends to electronics. Attenuation of ultrasound pulses determines viscous properties of the sample while sound speed – elastic.

Software calculates:

  • Liquid compressibility from the sound speed at single frequency.
  • Bulk viscosity when liquid is Newtonian.
  • Longitudinal viscosity if liquid is non-Newtonian at frequencies 1 to 100 MHz.
  • Viscous and elastic longitudinal modulus G’ and G”.
  • Verifies Newtonian nature of the liquid when assuming viscosity being independent of frequency for Newtonian liquid.

Required minimum sample volume is below 5 mL.

Total weight is about 20 kg (60 pounds).