Leo Survey Instrument Co.,Ltd
Leo Survey Instrument Co.,Ltd Professional Survey Accessory Supplier
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Leica GMP111 Mini Survey Prism Set (+17.5mm) With Holder and Aluminum Poles
Model: GMP111-17.5
Package Includes:
• Prism (+17.5mm constant)
• 4x Poles (screw-on aluminium, permitting five prism heights - 10, 40, 70, 100 & 130cm)
• 1x Spike
Specifications and Features:
Prism Constant: +17.5mm
Centering Accuracy: 2.0mm
Range: 2000m (IR)
Conveniently storable in the instrument container, the GMP111-17.5 offers high positional accuracy due to its small size.
The GMP111 has a built-in levelling bubble and is supplied with an attachable spike (1/4" thread). With this arrangement a point can be measured with very high precision.
This mini prism set includes 4 screw-on aluminum rods with 1/4" threads permitting five different prism heights, up to 50". Holder and housing are made of red polymer, fiber-reinforced.
Optical Survey Prism Applications
Surveying reflector prisms are used by surveyors and engineers to measure the change in position of a target that is assumed to be moving. Survey prisms are used for a wide range of monitoring applications including:
Prism Range
Surveying Prisms, also known as retro-reflectors, redirect a measuring beam back to the EDM (Electronic Distance Measurement) for processing distance. There are two main factors for good range measurement: prism diameter and beam deviation. If the beam deviation is not accurate then the returned beam will miss the EDM completely. This occurs mainly near the maximum range of the EDM.
Prism Holder Accuracy
Prism accuracy is determined by the physical location of the prism in its canister and then to the prism holder.
Package: