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Australia Tel: +61 (0)3 8720 6700
Indonesia Tel: +62 21 3040 4422
New Zealand Tel: +64 (0)7 850 2610
South Africa Tel: +27 (0)10 900 2055
Australia Tel: +61 (0)3 8720 6700
Indonesia Tel: +62 21 3040 4422
New Zealand Tel: +64 (0)7 850 2610
South Africa Tel: +27 (0)10 900 2055
The Model 4020 Deep Hole Extensometer system uses stainless steel high tensile wires connected to spring anchors mechanically placed in the borehole (borehole not grouted). At the collar, these wires are connected to spring loaded sensors in a head frame. This provides a physical means of measuring the displacement in the zone between workings and surface displacements. Displacement ranges available are 1m, 2m and 3m. Up to 20 anchors can be placed in one hole. Read using Model 9600-2 readout or log using datalogger.
Measurement of settlements, subsidence, displacements and deformation in: