The dGMM is designed to measure ground movement, and its flexible shaft can accomodate eccentric loading or shear. It can be configured as a crack monitor or can be used for structural monitoring of shafts, headframes or barricades or as a closure station.
The dGMM, is a magnetostrictive displacement sensor with a resolution of 0.01mm and a range of 145 – 290mm. The sensors are completely sealed against the environment and are temperature controlled. It has an on-board microcontroller running YieldPoint’s proprietary d-Tech signal processing and transmission technology, to provide a high precision single point displacement sensor.
Specifications | |
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Borehole size: | 30mm+ |
Core Technology: | magnetostrictive displacement sensor |
Output Signal: | RS485 serial (9600,8,N,1) ASCII-encoded digital signal. |
Stroke (F.S.): | 145mm. Temp: -40 to 125°C |
Displacement Resolution: | 0.01mm with hand held readout |
Displacement Linearity: | typically 0.25% F.S |
Displacement Accuracy: | better than +/- 0.5mm. |
Temperature Range: | –40 – 125°C |
Temperature Accuracy: | +/- 2°C –Digitally trimmed at 0°C and 25°C |
Temperature Resolution: | 0.1°C |