HIGH-PRECISION EXTENSOMETERS FOR MATERIAL TESTING

Often different methods need to be combined to accurately describe material properties and influencing parameters. Extensometers are essential here. They assure direct measurement as well as monitoring of strain and crack depth at a preselected area of the material specimens.

Since the extensometers are in direct contact with the material specimen, they must be capable of satisfying the extremely diverse test conditions to which the material specimen itself is exposed. The most important test conditions, which may occur in almost any combination, demonstrate that an extensometer must exhibit a number of properties.

Extensometer overview EX...
From top to bottom

EXR10-0,5 Crack widening
for CT specimens or for finding the J-Integral

EXD15-0,5 Diametral
for measuring diametral change, e.g. on flat and round specimens

EXA25-0,625 Axial
for measuring change in length, e.g. on flat and round specimens

EXA10-0,5 Axial
for measuring change in length, e.g. on flat and round specimens

EXA Axial-Extensometer
Clip-on extensometer

EXA10-0,25
for measuring change in length, e.g. on flat and round specimens. Easy to mount clips provide secure seating of specimens with rough and uneven surfaces.

lo: 10 mm
Measuring path: ±0.25 mm
Temperature range:
-270 °C to +300 °C

EXRC Extensometer
(Compact tension)
Clip-on extensometer

EXRC 4+4
for CT specimens or for finding the J-Integral Various initial measurement lengths can be obtained. Specimen with worked-in cross-cuts.

lo: 4 mm
Measuring path: +4 mm
Temperature range:
-270 °C to +300 °C

EXR Crack Propagation-
Extensometer
Clip-on extensometer

EXR10-0,5
CT-specimen with screwed-on countercuts. Various starting measurement lengths can be obtained

lo: 10 mm
Measuring path: ±0.5 mm
Temperature range:
-270 °C to +300 °C

EXH High Temperature Axial-
Extensometer without water cooling

EXH 25-2,5 A
for axial high-temperature specimens, e.g. for LCF (low cycle fatigue) tests.

lo: 25 mm
Measuring path: ±2.5 mm
Temperature range: +1800 °C

EXH High Temperature
Diametral-Extensometer
without water cooling

EXH 15-0,625 D
for diametral high-temperature specimens to measure change in thickness.

Specimen thickness: 5-15 mm
Measuring path: ±0.625 mm
Temperature range: +1200 °C

EXH Axial-Torsion-
E xtensometer for high temperature with water cooling

EXH
for high-temperature tension-torsional studies

lo axial: 16 mm
Measuring path, axial: ±0.5 mm
Measuring path, torsional: ±0.5 mm
Temperature range:
- 80 °C to + 1800 °C

Extensometer retrofit kits

A small selection from our accessories program

Diametral retrofit kit for flat and round specimens

High-temperature EXH**A Kit Axial measuring base extender

Axial measuring path extender