Mechanical gauge is recommended as a substitute for the Whittemore
strain gauge for many applications. Designed to measure strain in
masonry-type materials, structural components under load, opening or
closing of structural cracks, measuring relative structural
displacements, rock mechanics testing and drying shrinkage of concrete
block testing. Instrument frame is cast aluminum alloy with 5 master
settings of 2, 4, 6, 8 and 10 inches, easily set for gauging. Dial
indicator has .0001" minimum graduation; effective strain range is 0.3".
Maximum linear measurement is 0.4". Set includes: strain gauge, dial
indicator, 8 brass inserts, 2 contact seats, 2 mounted contact points,
invar master bar, punch bar and one compartmented wood storage case.
Metric model has 5, 10, 15, 20 and 25cm settings and dial indicator with
002mm graduations. Meets ASTM C426.