GDS - High Pressure Environmental Triaxial System (HPETAS)
Laboratory Rock & Soil Testing
    Model:HPETAS
    Country of Origin:UK
    Use:The high pressure environmental triaxial system (HPETAS) cell can be fitted with a heating or cooling system that is automatically controlled alongside the whole system via software. ba
    sed on all of the same features as the GDSTAS system, the main difference with the HPETAS system is the triaxial cell and the optional heating system. All of the same features apply for this system as for GDSTAS (stress paths, slow cyclic loading etc).
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The Environmental Triaxial Automated System (ETAS) is a temperature controlled load frame-based triaxial testing system. Key features include, Frozen Soil Testing, Gas Hydrate Testing, High Pressure Testing and High & Low Temperature Testing.
The -30oC cooling system provides ideal conditions for frozen soil testing. Its high pressure testing capability (up to 100MPa) along with low temperature provides the ideal environment for Gas Hydrate Testing. The system also has the option for a Heating only system.



Key features Benefits to the user
Heating & Cooling Options: 
-30oC  to +65oC
-20oC  to +80oC
-10oC  to +65oC
The cooling system uses a coiled tube section inside the cell, this is connected through the standard ports within the cell base to a glycol cooling unit allowing temperature transfer close to the specimen.
Optional Heating Only System:
Ambient to 60oC
Ambient to 100oC
The heating system works using thermal pads attached to the outside of the triaxial cell then enclosed within an environmental chamber to retain the heat. There are up to 4 temperature sensors relaying back to the control box for enhanced temperature accuracy.
High Pressure (Up to 100MPa): High Pressure combined with low temperature make it ideal for Gas Hydrate testing.
Gas Hydrate Testing (Gaseous back pressures):  The ETAS can be adapted for gaseous back pressures such as Air, Carbon Dioxide,  Nitrogen or Methane for Gas Hydrate testing.
Frozen Soil Testing: Cooling to -40oC provide ideal conditions for frozen soil testing.


Load Range (kN)

50, 100, 250, 400, 500, 1000

Pressure Range (MPa)

14, 20, 32, 64 (Alternatives available on request)

Sample Sizes

38mm – 300mm


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STQ180049    ETAS - 50kN/76mm/3.5MPa TRIAXIAL AUTOMATED SYSTEM+Temperature items
STQ180050    HPETAS - HIGH PRESSURE ENVIRONMENTAL TRIAXIAL AUTOMATED SYSTEM 50kN
STQ180142   1000kN HIGH PRESSURE ENVIRONMENTAL TRIAXIAL AUTOMATED SYSTEM  1MN
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