This mechanical strain measurement apparatus is used to determine the strain in concrete structures, rock strata etc. in remote areas and under adverse conditions. The instrument consists of an extensometer with dial gauge 0.002 mm. sens. calibration bar, 50 datum disks, special adhesive, carrying case. The extensometer consists of an INVAR main beam with two conical locating points, one at a fixed position and the other pivoting on a special knife edge. Locations of the gauge points is made from stainless seteel datum disks, cemented to the structure using suitable bar and adhesive supplied along with it. The gauge length 400 mm in accordance with the provision of MS26:Part 3:1992. Six pairs of DEMEC studs were fixed onto each of the TIA composite panels. Weekly measurement was made to observe the changes in length until 56 days. Subsequent measurements were taken after six months.

Features of TestMate

1. Portable and self contained
2. Fast and economical