Extensometer

Measurement of soil and rock movement including settlement and heave in foundations and embankments, subsidence, movement of natural and cut slopes, quarry and mining excavations, relaxation of rock around tunnels and other underground openings, radial movements and convergence of tunnels, shafts, linings and caverns, deformation of excavations in underground power houses, caverns and adits, displacements of retailing walls, cuttings, bridge piers, arches and abutments, lateral strains and settlement, foundation movements and subsidence, slope and excavation control, joint and fault displacement provides profile of extension if chained in series.