L74 Optical Dilatometer

Research Optical Microscope Dilatometer series – CTE


On point

The Optical Research Dilatometer L74 was developed to meet the demanding applications of the glass, ceramics, metal and energy industry. A high resolution CCD camera enables a visual real time analysis of the sample expansion, either as single frame or as video sequences.

The big advantage of this method is that the sample is not burdened with any force. For soft samples or samples that melt during the measurement, this leads to a result, which is not distorted by the contact pressure.

Several correction and analysis features are incorporated into the LINSEIS Evaluation Software. The unique horizontal design enables most demanding applications.

The special solid-liquid adapter allows expansion / volume measurements of solids, liquids and solid – liquid phase transitions. There is also a special sample holders for measuring rigid foils available, which avoids measurement errors due to pushrod forces like in a classical dilatometer.


  • Non contact Expansion measurement
  • High resolution CCD camera
  • Heating microscope
  • Optical Fleximeter
  • Sessile Drop
  • Contact angle
  • Solid- liquid expansion (optional adapter)


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Dilatometer mit DSC Option

Modell L74 Optical Dilatometer
Optical measuring system: Optical dilatometer equipped with a high-resolution camera and fully automated focus
Temperature range: -100°C up to 500°C
RT up to 500/1000/1500/2000°C
Measuring system: optical non contact
Accuracy: up to 1 µm
Field of view: 3.3 x 2.8 mm
Atmosphere: oxidizing (optional: red., inert and vac.)
Vacuum: up to 10E-5mbar
Heating rate: 0.01 to 100°C/min (depends furnace)
Int. Standards: ASTM D1857, CEN/TR 15404,
BS 1016:Part 15, CEN/TS 15370-1, DIN 51730, IS 12891, ISO 540, NF M03-048
Interface: USB


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.


Linseis LFA 500 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



Optisches Dilatometer Probenbeobachtung

High temperature microscopy


Ash fusion microscopy





Optical Dilatometer Product brochure (PDF)

Optical Dilatometer
brochure (PDF)


Dilatometer Special Software Product brochure (PDF)

Dilatometer Special Software
Product brochure (PDF)