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The GEOSTRING system consists of a number of sensor nodes in a vertical string installed in either 70mm (2.75-inch) diameter inclinometer casing, 85mm (3.3-inch) inclinometer casing or in 38mm (1.5-inch) diameter Schedule 40 PVC pipe.

The pipe or casing provides access for subsurface measurements. The joints between each sensor are robust, allowing the system to maintain a consistent orientation of all the nodes, regardless of whether it is installed in ABS inclinometer casing or PVC pipe.

The pipe or casing is typically installed in a vertical borehole that passes through a suspected zone of movement. The nodes are spaced at 2 ft (imperial version) or 0.5m (metric version) intervals and provide a reading resolution similar to a  traversing probe. The system spans the zone of movement occurs, the pipe/casing moves as well, changing the inclination of the nodes inside.

Inclination measurements from the nodes are processed to provide graphs of the casing profile and changes in the profile. Changes indicate displacement (movement).

The system requires casings, GEOSTRING segments, a suspension kit, a bottom plug and a jumper cable.

Nodes, cables, connectors and gage rods are exceptionally durable, making it practical to remove the systems at the end of the project and redeploy them on other projects.