Resodyn Acoustic Mixers

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RAM technology harnesses resonance to generate powerful and efficient mixing performance.


RAM generates a high level of energy by seeking and operating at the “resonant condition” of the mechanical system – at all times. Like all physical objects, a RAM system has a specific resonant frequency. This frequency, nominally between 58 and 62 Hz, is constant when at rest but is continually monitoring, adjusting, and changing when in operation.

  • RAM monitors mixing condition changes multiple times per second to balance kinetic energy or mixing forces, and potential energy or stored forces.
  • This balancing action allows the RAM mixer to apply all forcing energy – up to 100 g – directly to the mix ingredients.
  • RAM continually adjusts to the changing damping characteristics in the mixing vessel to stay at the resonant frequency of the entire mechanical system including the materials being mixed.
  • The dual purpose of this adjustment to deliver maximum power at the resonant frequency and to operate at the most efficient power consumption level, as the graph above illustrates.
  • When the RAM system is operating at the resonant condition, it can deliver the greatest amplitude or displacement using the least amount of power that maintains the resonant condition.

RAM turns sound energy into mixing solutions.

  • All RAM products generate intense mixing and processing energy by oscillating rapidly (frequency) with a relatively large displacement.
  • Ultrasonic technologies operate at very high frequencies (Hz) in the range of 25,000 cycles per second and higher but have a very small effective range or displacement.
  • Paint mixers, on the other hand, at high displacement of several inches or more, but at very low Hz in the range of 12-15 cycles per second.
  • RAM’s combination of moderate (60 Hz) frequency and relatively large displacement (0.55”) generates an exceptionally high level of very efficient energy for RAM processing. This level of energy is measured in “g” or units of acceleration of gravity

The combination of the power of resonance and sound energy enable RAM mixing. RAM devices impart unique and differing physical and acoustic effects on the mixing ingredients, as illustrated below:

Mixing Materials RAM Processing Mechanism
Powders Chaotic Collision, Particle Redistribution, Vapor Pocket Movement
Liquids Intense Material Density Border Interaction through Surface Disturbances, Bulk Mixing
Slurries and Pastes Intense Material Density Border Interaction through Surface Disturbances, Simultaneous Mixing of All Ingredients throughout Material Matrix
Viscous Materials Intense Material Density Border Interaction through Surface Disturbances, Simultaneous Mixing of All Ingredients throughout Material Matrix
All Materials Instant and Continuous Bulk Mixing of Materials

RAM technology drives intense ingredient interaction at an ideal frequency for virtually any kind of mixing process.

Displacement & Frequency Infographic

Faraday Instability

Named after Michael Faraday, a 19th century scientist, Faraday Instabilities are nonlinear waves that appear on liquids due to the high amplitude, periodic driving force. Under the proper conditions, the flat surface of the liquid becomes unstable. RAM technology is particularly effective at inducing these instabilities and is the first technology to make practical use of the phenomenon.

In the high-speed video below, instabilities can be seen both above and below the clear liquid surface as spikes, or fingers above the surface as well as cavities below. Vast increases in the surface area of the material boundary facilitates and accelerates mixing of the materials.



When occurring in a liquid–solid mixing environment, the same phenomenon occurs, though largely hidden from view, resulting in rapid, thoroughly mixed and dispersed solids in the liquid matrix. In this high speed video, orange chalk is incorporated rapidly into corn syrup.


Select the material that best represents your processes to learn more about how RAM produces faster, higher quality, breakthrough results.

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