YieldPoint

An advanced ground movement monitor

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.

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Specifications
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