OMNI L-Bar Monitoring Prism Assembly – Copper Coated – 25 mm The OMNI L-Bar Monitoring Prism Assembly is a durable, low-profile solution designed for permanent installation in deformation monitoring, geotechnical, and structural surveying applications. Featuring a precision 25 mm copper-coated prism, this assembly delivers high reflectivity and strong long-range performance for total station and automated monitoring systems (AMTS). Constructed from anodized aluminum and hermetically sealed for weather resistance , the L-bar design allows for easy installation on structures while maintaining a compact footprint. With standard monitoring offsets and dual mounting holes, it provides a dependable solution for long-term monitoring programs in demanding environments. Copper-coated prisms are typically preferred for maximum range and signal return in monitoring applications. Key Features • 25 mm copper-coated prism – optimized for long-range monitoring performance • 2 arc second accuracy – precise measurement capability • Hermetically sealed design – resistant to moisture, dust, and harsh conditions • Anodized aluminum L-bar – durable, low-profile installation • Dual mounting holes (8 mm / 5/16″) – flexible attachment to structures • Prism constants: approx. -25.5 mm (Trimble/Topcon) / +8.9 mm (Leica) • Ideal for deformation monitoring, geotechnical instrumentation, and AMTS