3D hollow inclusion (HI) cell for rock stress measurement by overcoring or for 3D stress change monitoring. More than 1000 HI cells have been manufactured and supplied to customers located in Australia and overseas.
Top Logger for field measurement of HI cells, potentiometer based extensometers and resistance wire extensometers (RWEs). Stand alone USB drive logger or up to a 30 logger network system available. Long term battery life and no extra environmental protection required. Top Loggers can be located at the collar of a borehole due to cylindrical body.
Resistance Wire Extensometer. Highly accurate with high range in extension RWEs come in standard lengths 1/2m, 1m, 2m & 3m. RWEs are grouted into a borehole and find best use for measuring rock deformation or displacement within 10m of the borehole collar.