DIL L75 PT Vertical

Research Dilatometer – Vertical instrument for expansion measurement


On point

The vertical Dilatometer series DIL L75 V was specifically designed to cater to the needs of the academic community and research laboratories worldwide. This system allows for the precise determination of the thermal expansion behavior of a wide range of materials, including solids, liquids, powders, and pastes, making it suitable for various applications. The vertical “Zero-Friction” design of this system is especially well-suited for materials with low or ultra-low expansion characteristics, ensuring superior measurement results.

The DIL L75 V series is versatile and capable of conducting measurements under different environmental conditions, such as vacuum, oxidizing, or reducing atmospheres. It is available in both single and differential versions to provide higher precision or increased sample throughput. Additionally, the mechanical and electronic components of the dilatometer can be separated to allow measurements in a glove box.

This system is employed for the measurement of various physical properties, including:

  1. Coefficient of Thermal Expansion (CTE)
  2. Linear Thermal Expansion
  3. Alpha Physical
  4. Sintering Temperature
  5. Phase Transformations
  6. Softening Points
  7. Decomposition Temperatures
  8. Glass Transition Temperatures

The Cryo Option for Temperatures down to 10 K, available in the LINSEIS L75 Cryo “Ultra Low Temperature” series, extends the system’s temperature range from -263°C up to +220°C. It offers a wide selection of sample holders and allows operation in a vacuum or a controlled oxidizing or reducing atmosphere, all while maintaining high accuracy and user-friendly operation.


Model DIL L75 V*
Temperature range:  -263 up to 2800°C
Price range: $$
Delta L resolution: 0,03 nm
Measuring range: +/- 2500 µm
Contact force: 10 mN up to 1 N
Optical Encoder:
Delta L resolution: 0,1 nm
Measuring range: +/- 25000 µm
Automatic sample length detection: yes
Force modulation: yes
Contact force: 10 mN up to 5N
Multiple furnace configuration: up to 3 furnaces
Motorized furnace operation: included
– (Unsichtbar, siehe EXTRA CLASS NAME unten) – – (Unsichtbar, siehe EXTRA CLASS NAME unten) –
Gas dosing: manual gas dosing or mass flow controller 1/3 or more gases
Contact force adjustment: included
Single/double dilatometer: optional
Softening point detection: included
Density determination: included
L-DTA: optional (up to 2000°C)
Rate controlled sintering (RCS): included
Thermal library: included
Electric thermostatization of measuring head: included
Low temperature options: LN2, Intra
Vacuum tight design: yes
Automatic evacuation system: optional
OGS oxygen getter system: optional


Temperature Type Heating element Atmosphere Temperature sensor
-263 – 300°C L75/264 He Thermo coax inert, oxid., red., vac. Semiconductor / Pt 100
-180 – 500°C L75/264 Thermo coax inert, oxid., red., vac. Type K
-180 – 700°C L75/264/700 Thermo coax inert, oxid., red., vac. Type K
-180 up to 1000 L75/264/1000 Thermo coax inert, oxid., red., vac. Type K
RT – 1000°C L75/220 Kanthal inert, oxid., red., vac. Type K
RT – 1400°C L75/230 Kanthal inert, oxid., red., vac. Type S
RT – 1600°C L75/240 SiC inert, oxid., red., vac. Type S
RT – 1650°C L75/240 PT Platinum inert, oxid., red., vac. Type S
RT – 1750°C L75/240 M MoSi2 inert, oxid., red., vac. Type B
RT – 2000°C L75/260 Graphite N2/Vac. Type C and/or pyrometer
RT – 2400°C L75/270 Graphite N2/Vac. Pyrometer
RT – 2800°C L75/280 Graphite N2/Vac. Pyrometer

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Sample holder for DIL

  • Sample preparation devices
  • Different types of vacuum and turbomolecular pumps
  • Different types (designs/materials) of sample holders
  • Vernier calipers for online input of the sample length
  • Turntable for multiple furnace configuration
  • Selection of Gas Boxes for up to 4 gases
  • Possibility to operate under H2


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 Thermogravimetric measurement. Thanks to our specialists and application experts, LINSEIS was able to develop comprehensive easy to understand user friendly application software.


  • 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

General 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


Applications example: Glass Ceramic

Dilatometric analysis is an effective technique for determining the thermal expansion (Coefficient of Thermal Expansion or CTE) and the softening point of glass ceramic materials. In addition to measuring the absolute expansion and CTE, it allows for the calculation of the first derivative of absolute expansion. This derivative provides valuable information for locating the maximum point of thermal expansion, which is crucial for determining the softening point of the material. By identifying the point at which the first derivative crosses zero, the softening point of the glass ceramic material can be accurately determined. This data is essential for quality control, material characterization, and the development of glass ceramic products with specific properties.

Applications example: Ceramics / Powder metallurgy

In the production of high-tech ceramics, simulating sintering processes is a valuable tool. The use of the optional software package RCS (Rate Controlled Sintering) enables controlled sintering programming with a dilatometer based on the PALMOUR III theory. This approach allows for precise control of the sintering process to achieve specific material properties and characteristics. An example of this application is the sintering of ZrO2 (zirconia), where the final density of 100% is successfully attained. During the sintering process, the initial heating rate decreases as the material reaches its desired final density. This controlled sintering technique is critical in achieving the desired properties in high-performance ceramics used in various advanced applications.

External application

Thermal expansion evolution of metastable β Ti-15Mo alloy during linear heating (published IOP Conference Series: Materials Science and Engineering)



DIL L76 and 75 Product brochure (PDF)

DIL Special Software Brochure (PDF)

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