dGMM

A single channel Ground Movement Monitor that can be used to measure deformation or displacement in many different configurations.

Magnetostrictive, non-contact technology for immunity to hostile environments

Digital (d-Tech) 145mm stroke length

High accuracy (0.5% FS) and resolution (0.01% FS)

dGMM

A single channel Ground Movement Monitor that can be used to measure deformation or displacement in many different configurations.

Magnetostrictive, non-contact technology for immunity to hostile environments

Digital (d-Tech) 145mm stroke length

High accuracy (0.5% FS) and resolution (0.01% FS)

dGMM

A single channel Ground Movement Monitor that can be used to measure deformation or displacement in many different configurations.

Magnetostrictive, non-contact technology for immunity to hostile environments

Digital (d-Tech) 145mm stroke length

High accuracy (0.5% FS) and resolution (0.01% FS)

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.

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