Soil Instruments manufacture a range of extensometers for measuring soil compression, settlement and heave of soil and rock in tunnels, shafts and foundations, and ground movement in boreholes.
Continuous Rod Extensometer
The Continuous Rod Extensometer system accurately measures settlement and/or heave at single or multiple anchor points in a borehole and at its reference head.
Digital Tape Extensometer
For quick and accurate measurement of relative distances between pairs of reference points on the surfaces of structures including radial movements and convergence of tunnels, shafts, linings and caverns.
The INCREX (Incremental Extensometer) system utilises electromagnetic induction phenomenon and together with inclinometer casing facilitates highly accurate measurements of ground movements in the direction of the borehole axis.
Magnetic Probe Extensometer
The Soil Instruments Magnetic Extensometer is used to monitor soil or rock settlement and heave in excavations, foundations, dams, and embankments, tunnels, shafts and sheet piles.
The Rod Extensometer system accurately measures settlement and/or heave between single or multiple anchor points in a borehole and at its reference head.
Vibrating Wire Soil Extensometer
The Vibrating Wire Soil Extensometer measures lateral deformation of soil and rock, particularly in embankment dams and quarry or mining excavations.