MPBX (Multi-Point Borehole Extensometers) are used to monitor for potential settlement and heave induced by construction activities such as tunneling and excavation. They can also be used to monitor deformation of retaining walls, cut slopes, and underground openings.

Lightweight and flexible, our SMART MPBX (Multi-Point Borehole eXtensometer) has six anchor points and an integrated electronic readout head. The small instrument diameter means that the head can be recessed in a 50 mm (2 inch) borehole – …

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Multi-point rod extensometers are installed in borehole to monitor displacements at various depths using rods of different material and lengths. A pre-set length of measuring rod is inserted into a nylon tube to avoid soil friction and its tip is fixed to a steel groutable anchor.

The MPBX, also known as multi-point rod extensometer, is designed to monitor changes in the distance between downhole 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.

The standard MPBX (Multi-point borehole extensometer) is a rod-type extensometer that monitors changes in distance between downhole anchors and a reference head. • Monitoring settlement in soil above tunneling and other mining activity. • Monitoring settlement due …

The d-MPBX is a unique 1 to 6-Point Multiple Point Borehole eXtensometer (MPBX) based on a single rod design. The anchors are fitted with stainless steel extension springs that secure the instrument in a 38-50mm borehole.

Monitor subsurface displacements with Specto Technology’s Borehole Extensometers. Featuring rods, anchors, and remote monitoring via dataloggers, our solutions ensure precise measurements at various depths. Explore our MPBX products today!

The SMART Contractometer utilizes a collapsible structure to allow it to measure convergence. It has been used in applications like shotcrete pillars, backfill convergence, sill pillar squeeze, and micropile loading. Like the MPBX, the Contractometer is a flexible, six-point fully recessable unit with an integrated electronic readout head.

A borehole extensometer is a precision instrument designed to help civil engineers and geologists in the measurement of the deformation of rock mass and adjacent or surrounding soil. Together with anchor bolt load cells, it is an essential piece of equipment for the investigation and monitoring of foundations, slopes & embankments and for studying.