The MPBX (multipoint borehole extensometer) is designed to monitor changes in the distance between down hole anchors, each set at a specified depth in the borehole, and a measurement head at the surface. Rods extend upward from the anchors to the head, where measurements are made with a depth micrometer or displacement transducers.
MPBX heads are sized to accommodate measurement ranges up to 100mm.

APPLICATIONS
Tunnelling
Deep excavations
Dams
Foundations
Settlement Monitoring
Rock displacements

Advantages:
→ Accurate, robust, high resolution and good long term stability.
→ Reading unaffected by cable length
→ Capable of withstanding thermal shock without defeating performance.

Specification:
Sensor: Vibrating wire
Range: 0-50mm, 100mm
Accuracy: ±0.25%FS
Operating Temperature: -20 to 60⁰C
Rod: 6mm dia SS Rod with studs
Anchor: 16mm dia, 250mm long groutable anchor