DIL L75 Laser

Highest Precision Laser-Dilatometer


On point

The Linseis Laser-Dilatometer of the Pico-series has ushered in an era of unparalleled resolution and absolute accuracy. True to its name, this technology achieves resolutions at the Picometer level, specifically 0.3 nm, which translates to 300 Picometers. In practical terms, this represents a resolution capacity that is 33.33 times higher than what was previously attainable.

The use of interference measurement principles further enhances accuracy, especially with the incorporation of specialized computer calibrations. The Linseis L75 Laser-Dilatometer requires only minimal sample preparation, much like a conventional push-rod type dilatometer. There are no stringent requirements for specific sample geometries, making it compatible with all types of materials, regardless of their reflective or non-reflective properties.

The measurement principle is rooted in “absolute measurement,” setting it apart from conventional double-sample push-rod Dilatometers and delivering significantly greater precision. Unlike conventional Dilatometers, there is no need for calibration, streamlining the measurement process.


Model DIL L75 Laser *
Temperature range: -180 bis 500°C
RT … 1000°C
Price range: $$$
Resolution: 0.3 nm
Heating/cooling rates: 0.01 K/min … 50 K/min
Sample holders: fused silica
Sample length: up to 20 mm
Sample diameter: up to ∅ 7 mm
Atmosphere: inert, oxic., red., vac.
Interface: USB

*Specs depend on configurations

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Sample holder for DIL

  • Tools for Sample Preparation
  • Variety of Vacuum and Turbomolecular Pumps
  • Diverse Range of Sample Holders (Varied Designs and Materials)
  • Vernier Calipers for Real-time Sample Length Input
  • Choice of Gas Boxes Supporting Up to 4 Gases


All LINSEIS thermo-analytical instruments are seamlessly integrated with PC control, operating exclusively under Microsoft® Windows® operating systems. Our comprehensive software comprises three fundamental modules: temperature control, data acquisition, and data evaluation. This 32-bit software encompasses all the essential features for precise measurement preparation, execution, and evaluation of Dilatometer measurements. Thanks to the expertise of our specialists and application experts, LINSEIS has successfully developed user-friendly, comprehensive, and easy-to-understand application software.

Key DIL-Features include:

  1. Glass Transition and Softening Point Evaluation: Enabling precise analysis of glass transition and softening points, essential in various material applications.
  2. Softening Point Detection with Automatic Software-Controlled System Shutdown: Ensuring a safe and efficient operation by automatically managing system shutdown during softening point detection.
  3. Display of Relative/Absolute Shrinkage or Expansion Curves: Providing clear and detailed visualizations of material behavior during thermal analysis.
  4. Presentation and Calculation of Technical/Physical Expansion Coefficient: Accurately calculates and presents expansion coefficients for in-depth material understanding.
  5. Rate Controlled Sintering (RCS) Software: Streamlining the analysis of sintering processes, a critical step in materials science and engineering.
  6. Sinter Process Evaluation: Offering insights into sintering processes for improved materials manufacturing.
  7. Semiautomatic Evaluation Functions: Enhancing the efficiency of data evaluation with semi-automatic features.
  8. Several System Correction Features: Ensuring precision through the incorporation of multiple system correction mechanisms.
  9. Automatic Zero Point Adjustment: Simplifying sample pressure adjustments for enhanced measurement accuracy.

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



Application example: Invar

An INVAR sample was subjected to four heating evaluations within an air atmosphere, covering the temperature range from room temperature to 200°C. This comparison underscores the unparalleled precision of the LASER measuring technique, with the variance among the four measurements being as minimal as 0.01% of the full scale (FS). Thanks to the patented LINSEIS Laser Dilatometer, resolutions can be achieved that surpass the capabilities of conventional Dilatometers by a remarkable factor of 33.

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