Wire Extensometer

Description

The Model 4015 Wire Extensometer uses flexible stainless steel wire rope sheathed in polyethylene tubing with plated anchors. The assembly is grouted into a borehole and a head frame with transducers is fitted. For large displacements, a spring loaded head frame is recommended (consists of up 6 spring loaded sensors). The unit can be read from a remote site data logger or read at the collar using Model 9600-2 10-channel extensometer readout.

Application

Measurement of settlements, displacements and deformation in:

• Tunnelling
• Open cut mines
• Dam construction
• Underground mines
• Large excavations
• Construction control

Features

• Complete instruments supplied ready for installation
• One to six anchor positions for varying ground conditions
• Compact design, for ease of transportation
• Transverse shear accommodation
• The head frame can be re-used on subsequent boreholes
• Three options for obtaining data including digital counter, hand held readout and data logger

Specification

• Sensor ranges: 0-1 m, 0-2 m, 0-3 m
• Resolution: 0.1 mm
• Maximum number of sensors: 6
• Nominal borehole diameter:100mm
• Maximum borehole length: 150m
• Measurement options: Digital counter, Handheld readout data logger
• Dimension (head assembly): 300mm x 300mm x 150mm
• Dimension (anchor): 60mm, expands up to 250mm