RTSS | Videoextensometer

Contactless Strain Sensor for Material testing

checkmark   For standardised tensile tests

checkmark   Easy specimen marking

checkmark   Optional measurement of transversal strain

checkmark   Strain from 0,0005% to 1000%

  RTSS Videoextensometer for material tests and tensile tests


The RTSS Videoextensometer measures the longitudinal and transversal strain during material tests (e.g. tension, compression tests). The system can be used for flat and round specimen at field of view (FOV) of 10mm to 1000mm. For rope testing a FOV up to 5m can be realized. Strains from 0.0005% to 1000% can be measured.  The RTSS (Real Time Strain Sensor) can be intregated via different interfaces as a strains sensor and can be fully integrated in a tensile test machine. Further offline analysis modules for the determination of strain distributions and crack length (e.g. long term tests) are available. 


Advantages of the RTSS Videoextensometers

  • Fast setup and easy specimen marking
  • Flexible field of view from a few mm to some m
  • Suited for all tensile test machines
  • Independant of the material
 RTSS videoextensometer for longitudinal and transversal strain measurement during tensile tests
Simultaneous measurement of longitudinal and transversal strain.


Contact less

No clamping =no mechanical influence of a mechanical sensor to the specimen:
    • High precision
    • No specimen influence/damage
Measurement of the strain at failure (no mechanical limitation of the sensor)

Material independent

Wide application field on all materials
Soft and rigid materials can be tested
Strains from 5µm/m to 1000%

Flexible field of view

Specimen size of a few mm to some m
For strains from 20µm/m until 1000%
Used at small and large tensile test machines
One system for
   • Different testing machines in one laboratory
   • Different tasks


Easy specimen marking
Can be used for tiny specimen due to enlarged image visualisation
Recording of movies for documentation and quality control
High precision, high speed
Simultaneous measurement of longitudinal and transversal strain


Fast system setup
Precise specimen alignment

Different data interfaces  

Compatible to all tensile test machines
Fully integrated with tensile test machines
Analogue or digital data interface to test machine
Usual data logging and determination of material properties (e.g. Young's module) by the tensile test software
Automatic control through tensile test machine/software


Easy system calibration with precise calibration plate
Testing according to standards without mechanical sensor tracking



Do you have questions related to our
products or services ?


Tel +49 (0) 2151 36528 00

We look forward to your phone call !