Magnetic Extensometer GMX Range

The GMX Range Magnetic Extensometer is a reliable and proven monitoring system designed to measure vertical and horizontal ground or structural movement across multiple depths. Widely used in geotechnical, mining, tunneling, and civil engineering projects, the GMX system provides accurate subsurface displacement measurements that help engineers assess settlement, heave, deformation patterns, and ground stability over time.

Using a series of magnetic targets installed along a borehole casing, the system enables precise detection of movement at each instrumented depth. A portable reed-switch probe is lowered inside the casing to locate magnet positions, allowing engineers to obtain repeat measurements whenever required. This non-complex, repeatable process supports long-term monitoring programs without the need for permanent electronics underground—making it ideal for environments with harsh conditions or limited access.

The GMX Range is compatible with standard inclinometer casings and can be customized for varying site conditions, including soft soil, rock masses, embankments, retaining walls, and foundations. Its simplicity, durability, and high accuracy make it a widely adopted choice for settlement monitoring, consolidation studies, monitoring of tailings facilities, embankments, landfills, and deep excavation work.

Designed for structural clarity and easy deployment, the system provides engineers with dependable data to analyze ground behavior, identify risk zones, and support early-warning decisions. With its modular design, the GMX Range offers excellent flexibility for multi-depth monitoring while maintaining low operational and maintenance costs.