The SMI MHR3 is a robust, user-friendly 3-point extensometer designed for underground mining. It monitors rock movement at three distinct points within a borehole, providing precise and comprehensive data on strata separation and roof sag to enhance ground stability analysis and mine safety.

The MHR3 is installed in a borehole with three anchors positioned at user-specified depths. Each anchor is connected to a rod that moves relative to a reference head at the collar of the hole. As rock strata shifts, the MHR3 measures changes in distance between anchors.

• 3-Point Monitoring: Tracks movement at three distinct points in a borehole for detailed ground stability insights.
• Robust Design: Built with durable materials (e.g., Delrin and non-corrosive metal) to withstand harsh mining environments.
• User-Friendly Mechanics: Simple installation, and low maintenance.• Data Logger Compatibility: Supports remote-readable configurations for precise data collection with devices like the Onset HOBO MX1105.

The MHR3 is ideal for mining companies, safety managers, and ground control teams who need reliable, multi-point monitoring to assess roof and wall stability in underground mines, enabling proactive safety measures and informed operational decisions.