1.Don’t need to adjust measurement head. It will be fixed while puts the specimen on the tester.
2.Reducing the contact time between the test piece and the external environment.
3.Can accurately read out the test result of speimen for shrinkage & expansion in 3 seconds .
4.Frame use high quality steel,solidly and durability
5.technical parameters:
measure range: 275-300mm
measure precision: 0.01or 0.001mm