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Leica GRZ122 360° Pro Prism

Description

Being a high performance prism reflector, the Leica GRZ122 can be connected to the Leica SmartAntenna. Additionally, it can be used inverted directly on a survey point with a height of 78mm.

The overall 3D pointing accuracy that can be achieved with the Leica Leica GRZ122 360° Prism is 2mm.

Specifications

Model:GRZ122
Manufacturer:Leica
MPN:754384
Height Offset:86.0 mm
Absolute constant: -11.30 mm
Leica constant: +23.10 mm
Dimensions (W x H x D):92.5x165x92.5 mm
Centring accuracy:±2.0 mm
Mount:12mm (Leica) Spigot

Notes:

  • Whilst the height of this prism is 86mm from the mounting point, it can be used inverted directly on the survey mark by using the in-built pointer at the top of the prism.
  • When using the GRZ122 this way, a height of 78mm must be used.
  • The top of the Leica GRZ122 360° prism has a 5/8″ thread mount.

Leica GRZ122 360° Pro Prism FAQ

Below is a list of frequently asked questions about Leica GRZ122 360° Pro Prism.

What is the prism constant for the Leica GRZ122 360° Pro Prism?

The absolute prism constant (true value) for the Leica GRZ122 360° Pro Prism is -11.3mm. The prism constant as defined for Leica instruments for Leica GRZ122 360° Pro Prism is 23.1mm. For a more detailed explanation on prism constants please see this article.

Can I use the Leica GRZ122 360° Pro Prism with a Leica instrument?

Yes, you can use the prism with a Leica instrument as long as you set up the correct prism constant in the instrument settings.

What is the prism constant value that I need to use with a Leica instrument?

In order to use the Leica GRZ122 360° Pro Prism with a Leica instrument you should use 23.1mm as the prism constant value.

What is the height offset of the Leica GRZ122 360° Pro Prism?

The Leica GRZ122 360° Pro Prism height offset is 86.0mm. This is measured from the mounting point to the centre of the prism.