The GMP104 Extended L-Bar Mini Prism is a compact surveying reflector designed for dependable target visibility and field durability in deformation-monitoring work.

The compact, lightweight GMP104 Extended L-Bar Mini Prism is suitable for fixed or repeat monitoring locations in subway tunnels, railroads, tunnels, dams, and steep-slope projects. Its L-bar configuration supports practical positioning where a stable reflective target is required.

GMP104 Extended L-Bar Mini Prism

GMP104 Extended L-Bar Mini Prism Key Features

Accurate optical targeting: The GMP104 Extended L-Bar Mini Prism uses a precision optical-glass 25.4 mm copper-coated prism to provide a clear reflective target for reliable measurement work.

Extended L-shaped holder: The GMP104 Extended L-Bar Mini Prism incorporates an extended L-bar holder that supports practical target placement in confined or infrastructure-monitoring locations.

Durable metal body: The main body of the GMP104 Extended L-Bar Mini Prism is crafted from high-quality CNC-machined anodized aluminum for strong corrosion resistance and dependable field durability.

Abrasion and drop protection: The GMP104 Extended L-Bar Mini Prism is fitted with a protective ABS outer cover to help reduce abrasion-related wear and improve protection against incidental drops.

Enhanced reflectivity: A reflective film helps the GMP104 Extended L-Bar Mini Prism deliver a clear, bright reflection for surveying and monitoring tasks.

Portable field design: The compact and lightweight GMP104 Extended L-Bar Mini Prism is easy to carry, transport, and deploy across multiple job sites.

GMP104 Extended L-Bar Mini Prism Specification

Parameter	Specification
Model	GMP104
Product name	GMP104 Extended L-Bar Mini Prism
Product type	Extended L-bar surveying mini prism / reflector
Holder configuration	L-shaped extended bar
Prism diameter	25.4 mm
Prism material	Optical glass
Prism finish	Copper-coated
Reflective enhancement	Reflective film
Main body material	CNC-machined anodized aluminum

GMP104 Extended L-Bar Mini Prism with 25.4 mm Copper-Coated Reflector for Tunnel & Railway Monitoring