Controls Group Automatic triaxial tests system - AUTOTRIAX2 EmS Automatic triaxial tests system - AUTOTRIAX2 EmS
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Soil mechanics

Automatic triaxial tests system - AUTOTRIAX2 EmS

The optimization of advanced technologies in hardware and software components for high efficiency triaxial tests

  • Download:
BS 1377:7 | ASTM D2850 | ASTM D4767 | BS 1377:8 | BS 1377:6 | ASTM D7181 | EN 17892:8 | EN 17892:9
Main features
  • 24/7 testing without interruption, maximizing productivity and reducing demands on your staff.
  • Automatic execution of up to six independent triaxial tests from start to finish with only one PC;
  • Fully PC control system with multitasking, user-friendly Windows-based, the PC software complies with relevant standards;
  • High-speed PC closed loop control for continuous monitoring and instantaneous reaction of systems components;
  • Modular design for easy expansion of the system, just adding proper software packages and components;
  • Maximum flexibility with four models of water pressure / volume controllers;
  • External factors and inconsistencies between different operators are minimized; test procedures are always repeatable and compliant;
  • Banded reinforced triaxial cell for max working pressure up to 3500 kPa, suitable also for extension tests;
  • Compatible with on-sample transducers and bender elements;
  • Space saving design;
  • Air compressor not required (with exception of unsaturated soils tests).
General description
General description
The AUTOTRIAX2  EmS is an advanced triaxial testing system that can automatically perform up to 6 entire and independent tests at the same time, from start to finish, without any human intervention.
The closed-loop feedback control system monitors the components status continuously, in order to react to any change in the parameter pre-set at each test stage.  
Autotriax2 EmS can perform different kind of triaxial tests, :
  • Total and effective stress tests UU (unconsolidated undrained), CU(consolidated undrained) and CD (consolidated drained) with isotropic conditions according to ASTM-BS-EN Standards; and CAU (consolidated undrained) and  CAD (consolidated drained) with anisotropic conditions. according to EN Standards 
  • Stress path tests following MIT and Cambridge methods;
  • K0 anisotropic volume controlled tests;
  • Permeability tests in triaxial cells according to BS 1377: 6;
  • Unsaturated soil triaxial test with control of matric suction using the axis translation method.
Also, additional software package available on request for performing:
  • CRS – Constant Rate of Strain
  • Unconfined compression
  • CBR (California Bearing Ratio)

A typical PC controlled fully automatic triaxial configuration includes:

Load frame 
TRITECH 50 kN or 100 kN: TRITECH original high-performance load frames for triaxial tests, ideal solution for advanced and research laboratories that want to perform high quality tests at high productivity levels, directly managed by data acquisition and control unit.  

Triaxial cell with accessories:
The proper model can be selected from our range (see triaxial load frame TRITECH  and triaxial cells for advanced applications or  double wall triaxial cells required for unsaturated tests) or, as alternative, existing machines can be used.

Data acquisition and control unit 
Data acquisition and control unit transmitting data and information between the software and all the active components, such as pressure controllers and Tritech triaxial load frame.

Pressure/volume controller
Four models are available depending on: max pressure capacity (3500 or 1700 kPa) and number of pressure lines (one or two).

Triaxial test automatic control and processing software.
The AUTOTRIAX2 EmS software is a comprehensive and user-friendly interface between the operator and the testing system.
The Autotriax2 EmS configurations can be extended and expanded in subsequent steps, in order to control further tests adding proper components. These operations can be easily made on site just configuring the user-friendly software, as a plug-and-play system.

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Technical specifications

  • Maximum no. of simultaneous tests: 6
  • Maximum no. of channels: 96 (in the most extended configuration)
  • Capacity: 50 kN and 100 kN  (11,000 lbf  and 22,000  lbf)
  • Speed range: 0.00001 – 99.99999 mm/min (0.00001-3.90000 in/min)
  • Specimen range: 38,50,70,100,150 mm diameter (1.5", 2.0", 2.8", 4.0", 6.0" diameter)
  • Water working pressure: 1700 or 3500 kPa ( 250 or 500 psi)
  • Pressure resolution: 0.1 kPa ( 0.01 psi)
  • Maximum capacity of pressure / volume controller: 250 cc
  • Volume resolution: 0.001 cc
  • Effective resolution: 131000 points
  • LAN communication   
  • Units: S.I. Units or US customary Units 

Ordering info

Triaxial load frame TRITECH
Triaxial cells for advanced applications
Data acquisiton and control unit 

Data acquisition and control unit for triaxial tests - AUTOTRIAX2 EmS
External load cells or Submersible load cells
Axial strain displacement transducers
Pore pressure 
Pressure transucers for triaxial test
Pressure and volume controller for triaxial tests - AUTOTRIAX2 EmS

Standalone all-in-one de-airing water system


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