Tough, rugged and simple mechanical devices that deliver a low-cost, easy to install solution for safety monitoring in mines and tunnels.
The units incorporate high-visibility reflective colour bands that provide a clear at-a-glance indication of roof movement in the local strata, with tubular indicators also operating side-by-side in the same reference unit to provide extra reliability. A windows software package is also available to assist in recording, presentation and analysis of Extensometer data.
Exceptional in-hole stability through a unique anchor system and reference tube assembly ensures that the EWV-X is the most accurate and dependable mechanical extensometer package in the world.
Stainless steel reference tube anchor
Positive stop stabilising fins
High grade stainless steel wire