Leica GPR112 Monitoring Prism The Leica GPR112 Monitoring Prism is a large-diameter high-performance reflector designed for long-range monitoring and deformation measurement applications, delivering high-precision targeting, extended measurement range, and reliable environmental protection . Engineered for permanent or semi-permanent installations, it mounts on M8 or 5/8" threaded systems , making it suitable for structural monitoring, infrastructure surveying, and automated total station workflows. Built for demanding outdoor conditions, the GPR112 includes an integrated rear filter to reduce condensation and maintain stable optical performance over time, supporting reliable long-distance measurements up to 2,500 m. Key Features • Large-diameter prism for long-range monitoring up to 2,500 m (8,200 ft) • Mounts on M8 or 5/8" threaded bolt systems for flexible installation • Built-in rear filter to reduce condensation and maintain optical clarity • Designed for structural monitoring and deformation measurement workflows • Suitable for permanent and semi-permanent survey installations