Mechanical strain gauges
- Product Code: CN363
Standard : ASTM C 426 BS 1881: 206
For measuring linear deformations on mortar, rock, concrete specimens.
The instrument comprises an Invar bar which has a head with a conic point at each end.
The point at one end is fi xed whilst the one at the other end can be slightly rotated around a perpendicular axis.
The rotational motion is transmitted with a 1:1 ratio to the dial gauge with 5 mm travel (-2.5 +2.5).
The structure to be checked is prepared by gweing together 2 disks with marked centres.
Position at which, to glue the disks is given by the gauge stick that has fi xed points at each end.
Variation of distance between the two disks is measured with micrometric precision and shown on the instrument.
The equipment comprises the instrument, the gauge stick, 50 datum discs, 1 tube of adhesive.
Gauge length: 300 mm (standard).
Upon request other lengths (200-250-400-600-900 mm) are also available.
Dimensions: 350 x 200 x 100 (h) mm.
Weight: 3.2 kg.