Leica GRZ101 360 Degree Mini Prism

The Leica GRZ101 is an ultra-lightweight, 360 degree mini passive prism engineered for short-range robotic total station surveying. Featuring a six-corner cube design, it delivers an exceptional centering accuracy of 1.5mm.

Six Corner Cube Geometry: Joins six miniature prisms together to provide uniform 360 degree reflective coverage from any approaching instrument angle.
Premium Centering Precision: Exploits a miniature mechanical footprint to achieve an exceptional 1.5mm pointing accuracy for high-tolerance layouts.
optimised Short Range ATR: Engineered specifically to support automatic target recognition and lock modes at tracking distances up to 350 meters.
Universal Threaded Base: Features an integrated 1/4-inch internal mounting fitting to accept mini staffs, extension kits, or spigot adapters directly.

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FAQs

What is the exact absolute prism constant for the GRZ101?

The GRZ101 is designed with a specific Leica prism constant of +30.0mm, which must be correctly selected in your total station’s reflector settings to guarantee true distance calculations.

Why would a surveyor choose this mini model over a standard GRZ4 360 prism?

The smaller physical dimensions significantly reduce target centering errors, allowing the GRZ101 to deliver a much tighter pointing accuracy of 1.5mm, which is critical for close-range structural monitoring and high-tolerance concrete layouts.

Can this prism be mounted onto a standard survey pole?

Yes, but because it features a native 1/4-inch thread, you must use a Leica GAD103 adapter to mount it securely onto a standard pole equipped with a Wild pin stub fitting.

What is the native mounting attachment style on the base?

The base of the mini reflector housing is machined with a standard 1/4-inch female thread, making it directly compatible with Leica GLS115 mini poles and point attachments.

Is the Leica GRZ101 Mini Prism available to hire?

Yes, this high-precision 360 degree mini prism is fully available within our surveying rental fleet for both short-term and long-term hire, offering a flexible solution for high-accuracy monitoring contracts without capital investment.

Does the orientation of the prism face back to the total station matter?

No, the six joined corner-cube prisms evenly distribute incoming light beams, providing virtually identical offset and measurement accuracy readings from any horizontal side.

Can this prism be used in manual surveying without a robotic tracking instrument?

Absolutely, it functions perfectly well as a passive target for standard manual total stations when taking distance and angle measurements without automated tracking turned on.

Does the total station PowerSearch function work effectively with this mini prism?

The GRZ101 has restricted functionality with long-range PowerSearch sensor sweeps due to its small physical size; it is best utilized with standard ATR search routines or manual aiming to establish initial lock.

What power source does the GRZ101 use?

The GRZ101 is a passive optical surveying accessory containing high-accuracy corner-cube glass prisms and does not require any batteries or electrical power to operate.

Is the glass treated to prevent measurement signal distortion?

Yes, the internal optics are manufactured to Leica’s strict anti-reflective technical guidelines to maintain high signal return levels and minimize systematic angular deviations during tracking.