Cliff Instrument/ Instrument Jurang
Rock mass monitoring is performed with sensors that measure:
- Displacement in various points of the rock mass using borehole extensometers in order to check crack evolution
- Movements across surface cracks using rock spys
- Rock mass tilt using tiltmeters
- Loads in tie-backs using load cells
All sensors are linked to a datalogger Model SENSLOG that records the measurements taken at predetermined intervals, and that can trigger alarms based on specifi c threshold values.
Roctest Telemac Instruments The product line is designed based on the following measurement technologies:
1. Vibrating wire sensors in dampened or sustained excitation mode
2. Electrical sensors including resistive, inductive, potentiometric, magnetoresistive types and linear variable differential transformer (LVDT)
3. Fiber optic sensors
4. Pneumatic and hydraulic sensors
5. Tiltmeter electrolytic sensors