Extension measurement is one of Zwick’s core competences. Zwick’s product range contains extensometers with different resolution levels, measuring principles and measurement travel. A distinction is generally made between contact and non-contact measurement of extension, change in width or strain.
Non-contact extensometers
The crucial advantage of extensometers featuring non-contact measurement is that they can be used right up to break without risk of damage, even with specimens which are critical in this respect.
- videoXtens extensometer
- laserXtens extensometer
- lightXtens extensometer
These extensometers are used for direct extension measurement in tensile tests, flexure tests and alternating load tests. They all possess a large measurement range featuring stepless adjustment to suit the specimen being tested. Clip-on extensometers and extensometers with sensor arms are in direct mechanical contact with the specimen via knife-edges positioned at right angles to the gage length.
