MHR3 three-point extensometer, and instrument versions with adapters for digital data logging. These tools provide visual and digital indications of rock and roof movement, and can integrate with data loggers such as the HOBO MX1105 for detailed analysis. Simplified Mine Instruments also offers data interpretation and graphing services, along with technical support for installation, configuration, and use of its instruments. Its solutions are intended for mining companies, safety managers, and ground control teams needing practical monitoring of underground ground conditions.