DIL Dilatometer – L75 / Laser

DIL Dilatometer – L75 / Laser


Unmatched resolution and absolute accuracy is now possible due to the development of the Linseis Laser Dilatometer of the Pico-series. As the name indicates already the resolution goes up to Picometers (0,3 nm = 300 Picometer). That means resolutions can be obtained which are up to a factor 33,33 higher as the resolution that were possible up to date. On top the principle of interference measurement give the possibility for much higher accuracy’s, especially as some special computer calibrations are used.

Linseis L75/LASER only needs slight machining of the sample. All you need to do is just prepare one sample, as with the conventional push rod type dilatometer. The system does not require any specific sample geometry. All types of material, reflecting or none reflecting can be evaluated with the system. The measurement principle is an “absolute measurement”, not like conventional double sample pushrod Dilatometers, providing much higher precision. No calibration has to be undertake, unlike with conventional Dilatometers.


  • Precision measurement of thermal expansion of low expansion materials such as: carbon, graphite, composites, low expansion glass, amber alloy, quartz glass, etc.
  • Precision measurement of thermal expansion of semiconductor materials.
  • Quality control and quality inspection of materials of which thermal expansion characteristics can be a problem, such as glass, sealing materials, bimetals, materials for precision electronic instruments etc.


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


An INVAR sample was evaluated four times during heating in an air atmosphere. The temperature range was room temperature up to 200°C. This comparison clearly demonstrates the unbeaten accuracy of the LASER measuring technique. The difference of the four measurements is as low as 0.01% FS. With the patented LINSEIS Laser Dilatometer, resolutions can be obtained which are up to a factor 33 higher than the resolution possible up to date with a conventional Dilatometer.

Temperature range: -180°C up to 500°C
RT up to 1000°C
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


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