L75 / HP High Pressure Dilatometer (DIL Dilatometer)

Expansion measurements under temperature and pressure

Linseis L75 HP High Pressure Dilatometer (DIL Dilatometer) Dilatometry

The Linseis high-pressure dilatometer L75/HP enables completely new applications in thermal analysis. The system can measure expansions (length changes) in the temperature range from RT up to 1100/1400/1800°C and in the pressure range up to 100/150 bar. This device is the world's only available high-pressure dilatometer. A steam generator and camplex gas control system are optional available.

An get even more informations and extend your measeurement, an analysis of the effluent gases can be done by using a QMS or FTIR system at any time. But the coupling is more than only the sum of the separate parts. You can benefit from LINSEIS coupling knowledge and integrated hard- and software concept. For the interpretation of the results, different libraries are available.


    Model:  DIL L75 HP / 1   DIL L75 HP/2  
    Temperature range*: RT bis 1100°C RT bis 1400/1800°C
    Max. pressure: max. 150 bar  max. 100 bar
    Vacuum: 10E-4 mbar 10E-4 mbar
    Sample holder: fused silicia < 1100°C fused silicia < 1100°C
    Al2O3 < 1750°C Al2O3 < 1750°C
    Max. sample length: 50 mm  50 mm 
    Sample diameter: 7/12/20 mm 7/12/20 mm
    Adjustable sample pressure: up to 1000 mN up to 1000 mN
    Measuring range: 500 / 5000 µm 500 / 5000 µm
    0,125 nm  0,125 nm
    Options:  Pressure controllable Gas Mixing System (MFC´s)  Pressure controllable Gas Mixing System (MFC´s)  
    Atmosphere:  inert, oxid.**, red., vac.  inert, oxid.**, red., vac.

    * different furnace 

    ** not possible with graphite heater 

      All LINSEIS thermo analytical instruments are PC controlled. The individual software modules exclusively run under Microsoft® Windows® operating systems. The complete software consists of 3 modules: temperature control, data acquisition and data evaluation. The 32 bit software incorporates all essential features for measurement preparation, execution, and evaluation of a Dilatometer measurement. Thanks to our specialists and application experts, LINSEIS was able to develop comprehensive easy to understand user friendly application software.

      Gerneral features:

      • Program capable of text editing
      • Data security in case of power failure
      • Thermocouple break protection
      • Repetition measurements with minimum parameter input
      • Evaluation of current measurement
      • Curve comparison up to 32 curves
      • Storage and export of evaluations
      • Export and import of data ASCII
      • Data export to MS Excel
      • Multi-methods analysis (DSC TG, TMA, DIL, etc.)
      • Zoom function
      • 1 and 2 derivation
      • Programmable gas control
      • Statistical evaluation package
      • Free scaling


      • Glass transition and softening point evaluation 
      • Softening point detection with automatic software controlled system shut down
      • Display of relative/absolute shrinkage or expansion curves
      • Presentation and calculation of technical / physical expansion coefficient
      • Rate Controlled Sintering (RCS) Software
      • Sinter process evaluation
      • Semiautomatic evaluation functions
      • Several system correction features
      • Automatic zero point adjustment
      • Automatic software controlled sample pressure adjustment

        Here is a short extract of our available accessories:

          • Different types (designs/materials) of sample holders 
          • Instruments for sample preparation
          • Vernier calipers for online input of the sample length
          • Software Option for rate controlled sintering (RCS)
          • Various rotary and turbo-molecular pumps
          • Selection of manual, semi-automatic and automatic (MFC), Gas Boxes for up to 4 gases
          • LN2 Cooling
          • Possibility to operate under H2




            Polymers, Ceramic/Glass/Building Materials, Metals/Alloys, Inorganics


            Ceramics, Building Materials and Glass Industry, Automotive / Aviation / Aerospace, Research, Development and Academia, Metals / Alloys Industry, Electronics Industry

            Rock - Crystal (Calculated DTA)

            The thermal expansion of rock crystal can be easily evaluated with the L75 Dilatometer. The additional DTA feature enables an in depth view of the thermal behavior of the material. The DTA measurement is a mathematical routine based on the sample temperature. Exo- and endothermic effects influence the change of the sample temperature during the dynamic heating or cooling cycle. At app. 575°C the phase transition from takes place. The deviation of the measured temperature from the literature value (574°C) can be used for a temperature calibration.


            The linear thermal expansion (delta L) and the CTE of the iron sample under argon atmosphere are evaluated. The heating rate was 5K/min. After 736.3°C (peak temperature of CTE) shrinkage was detected, this is due to a change in the atomic structure, known as the curie-point. The difference of measured and literature result can be attributed to contamination of the sample.

              Watch the Linseis L75 / HP High Pressure Dilatometer