Investigations of samples should be consistently performed precisely, realistically and contamination-free. In particular, the study of phase change processes and formation of particles requires a sophisticated experimental setup.

Therefore we use a non-contact method, which can fix samples in a standing acoustic wave field. This tool is called an acoustic levitator. The great advantage is that you can study test substances contact-free under different pressure and temperature conditions of up to 20 MPa  between -20 and +180°C.

Applications range from the determination of physical data to particle formation. You can investigate phase change and mass transport processes without any wall-effects.

Possible fields of application

  • single-crystal growth
  • solidification of adhesives
  • melting and freezing processes
  • mass transport, chemical reactions, polymerizations
  • hydrate formation
  • density, interfacial tension and viscosity of levitated liquids
  • controlled evaporation and condensation processes
  • spectroscopy
  • chemical analysis

What is L800)?

Our L800) is a unique combination of an autoclave and an acoustic levitator.
One of the advantages of the L800) is its well-engineered levitation technology.

The samples can be immediately set to a floating mode by an integrated autopilot – even under pressures up to 20 MPa and temperatures between 253 K and 453 K.

While the sample is acoustically levitating in the high-pressure view cell made from titanium stabilized stainless steel, the contour of the droplet is automatically detected by means of the supplied software. With the detection of the sample shape it is possible to measure its volume over the time.

After the measurement a chart with all significant information (e.g. pressure, temperature, time, droplet volume etc.) and the video material of the entire measurement time are saved and can be used later on.

With these data it is possible to evaluate more accurately the effectiveness of mass transport mechanisms. Furthermore, the study of melting and solidification processes, polymerization, crystallization and fermentation are provided by the L800).

The various methods of spectroscopy are becoming increasingly important for the analysis of diverse samples. The use of transparent tool materials such as sapphire-windows allows to combine the L800) with methods of spectroscopy to measure e.g. the concentration in the droplet and the concentration in the surrounding of the acoustically levitated droplet.

Thus the measurement of the droplet-volume-change and the measurement of the concentrations (e.g. solubility, phase equilibrium) can be done at the same time.

The L800) has got a very compact designed housing made from powder-coated aluminium. This is a plug & play device which is upgradeable for your applications.

L800) consists of:

  • 1 x effective acoustic levitator
  • 1 x high-pressure view cell
  • 1 x screw piston pump
  • 3 x sapphire or borosilicate windows
  • 2 x pressure indicators (digital & analog)
  • 1 x temperature indicator
  • 1 x rupture disk (safety concept)
  • 1 x frequency generator and amplifier
  • 1 x camera, light source, touch-screen monitor, PC
  • 1 x user-friendly droplet size measurement software
  • 1 x attractive housing (new design concept)

L800) offers a huge variety of measurement options. It will help you to engineer and to improve environmentally friendly new processes and products. You can save material, time and costs. Everything you need to study levitated droplets under harsh conditions you get with our L800).

Characteristics of the L800 ultrasonic sonotrode for acoustic levitation

  • High-performance system / maximum AC voltage = 50 Vpp
  • Calm droplet and smooth shift from 90% round droplet to disc-shaped droplet
  • No cheeping, no unwanted sounds or noises
  • No overheating: The experiment can be run for several hours or the whole day
  • Working temperature area T = 253 K – 453 K at p = 20 MPa
  • Compact design including housing and BNC-connection
  • Sealing ( 1 x O-ring) very easy to exchange with supplied docking station

If you need more information please contact us.

High-Pressure View Cell


Levitated Droplet

Levitierter Tropfen-1