Length Comparator, Digital (AIM 374-1-DG)

The apparatus can be used for three basic tests:

Initial drying shrinkage 

The difference between the length of the cured specimen and the length when it is dried.

Drying shrinkage 

The difference between the length of the specimen from existing structure and its length when completely dried.

Moisture movement 

The difference between the length of the dried specimen and its length when again saturated with water.