Materials Testing
    Dynamic Triaxial System DYNATRIAX EmSDynamic Triaxial System DYNATRIAX EmSDynamic Triaxial System DYNATRIAX EmSDynamic Triaxial System DYNATRIAX EmSDynamic Triaxial System DYNATRIAX EmSDynamic Triaxial System DYNATRIAX EmSDynamic Triaxial System DYNATRIAX EmSDynamic Triaxial System DYNATRIAX EmS

Dynamic Triaxial System DYNATRIAX EmS

  • Electromechanical Servoactuation
  • Triple-axes closed-loop control
  •  High sensitivity closed-loop PID feedback

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Why buy from Geneq? - find out more

Dynatriax EmS benefits from CONTROLS Group new EmS "Electromechanical Servoactuation" technology. 

EmS technology is environmentally friendly and clean to operate, requiring no compressed air or hydraulic oil. It offers excellent reliability, accurate testing, and lower maintenance requirements. The intuitive design ensures it can be quickly and easily maintained, only requiring regular lubrication.

The system controls three closed-loop axes:

  • Axial load/displacement
  • Cell pressure up to 1000 kPa
  • Backpressure up to 1000 kPa

The base system includes:

  • Reaction frame
  • Robust 2-columns construction, stiff and compact
  • Electromechanical vertical load application
  • High-performance motorized actuator, 15 kN capacity, backlash-free, and noiseless
  • Sophisticated PID closed-loop control, ensuring the load is reached fast, smoothly, and accurately and then maintained with a high level of accuracy. The submersible load cell delivers high accuracy from the lowest values
  • Data acquisition, process, and control

The CDC manages up to 3 closed-loop axes (axial load/displacement, cell, and back pressure) with an effective loop rate of 10 kHz and performs the test completely automatically including the on/off valves for the drainage line and for the air supply to the triaxial cell. It is linked to the PC via LAN/Ethernet link (1 Gbit/s) and comes with 16 transducer ports (real resolution 16 bit).

  • PID control

An extremely efficient algorithm with larger gain ranges gives enhanced sensitivity, making it easier to tune the system and achieving a more accurate wave shape.

Recently added features include manual and automatic amplitude control which compensate for small changes that may occur in the system during cycling, ensuring that the required peaks are consistently reached. The improved tuning panel, with its more user-friendly interface, provides all the tools necessary to optimize the system control during static and cyclic test stages. 

Main Features

  • Electromechanical Servoactuation, no need of compressed air or hydraulic power supply for the vertical force 
  • Capability to perform Static (effective stress and stress path),Dynamic, and Unsaturated soil triaxial tests
  • Maximum dynamic load: 15 kN
  • Maximum static load: 10 kN
  • Triple-axes closed-loop control of axial load/displacement, cell, and backpressure
  • Automatic compensation of cell/backpressure during dynamic stage
  • Operating frequency more than 10 Hz (depending on test conditions)
  • Complete automation of all test stages using a high sensitivity closed-loop PID feedback
  • Options available for bender elements testing and for local strain transducers
  • Standard and user-defined wave shapes that can mimic the real in situ measurements (earthquakes)
  • Test set-up by the unique programmable multi-stage procedure. When a test is running, it is possible to access all parameters to expand and modify the stages as per the response of the specimen 
  • Manual and automatic emergency shut off function
  • Multitasking, user-friendly Windows-based software pre-installed on the PC
  • Extra-accurate transducers calibration adopting linear or polynomial regression or multi-coefficient linearization


  • AASHTO T307
  • ASTM D5311
  • BS 1377:7
  • ASTM D2850
  • ASTM D4767
  • BS 1377:8
  • ASTM D7181
  • ASTM D3999

Technical Specifications

  • Maximum dynamic load: 15 kN
  • Maximum static load: 10 kN
  • Maximum vertical travel: 50 mm (different travels available on request)
  • Maximum testing frequency: more than 10 Hz (depending on testing conditions)
  • Volume change measurement: 100 cc volume change device with automatic flow inversion
  • Max sample diameter: 100 mm
  • Maximum confining pressure: 1000 kPa
  • Maximum back pressure: 1000 kPa
  • Close loop control frequency: 10 kHz
  • Input channels: 16 - Real resolution 16 bits
  • Voltage:  208-230 V, 50-60 Hz, 1 ph  or  110 V, 60 Hz, 1 ph