Why This Instrument
The GRZ122 360 Prism is designed for surveyors who need fast target acquisition and continuous tracking during robotic total station work. Unlike a standard circular prism, the 360 reflector allows the instrument to read the target without the prism being precisely faced toward the total station.
This makes it particularly useful for one-person survey operations using ATR, where the surveyor moves around site while the instrument maintains lock on the prism. For Australian construction, rail, civil and infrastructure projects, the GRZ122 provides a practical target option for workflows that need speed, movement and reliable tracking.
What Sets It Apart
- 360-degree reflector design: Allows the total station to measure the prism from any direction, reducing the need to constantly rotate the target during field work.
- Built for ATR workflows: Supports Automatic Target Recognition, making it suitable for one-person robotic surveying where the instrument tracks the prism automatically.
- Up to 600 m ATR range: Provides practical tracking distance for construction set-out, topographic surveys, rail surveying and monitoring work on larger project sites.
- Leica +23.1 mm prism constant: Supports Leica total station workflows when the correct +23.1 mm constant is applied in the instrument settings.
- Trimble -11.3 mm prism constant: Allows use with Trimble total stations when the correct -11.3 mm prism constant is entered before measurement.
- Leica 12 mm spigot mount: Provides compatibility with Leica-style poles, adapters and survey accessories using a 12 mm spigot connection.
- Suitable for GNSS + total station workflows: Works well in integrated survey setups where crews move between satellite positioning and total station measurement.
- Efficient for one-person survey operations: Helps reduce time spent adjusting prism direction, making it a practical 360 prism for one-person ATR surveys in Australia.
| Product | 360 Prism |
| Part Number | GRZ122 |
| Prism Type | 360 reflector |
| Primary Use | Topographic surveys, construction set-out, rail surveying, machine control support, monitoring surveys and integrated GNSS + total station surveying |
| ATR Range | Up to 600 m for Automatic Target Recognition workflows |
| Prism Constant — Leica | +23.1 mm |
| Prism Constant — Trimble | -11.3 mm |
| Mount Type | Leica spigot |
| Spigot Size | 12 mm |
| Compatible Workflows | One-person robotic surveying, ATR tracking, construction set-out, rail survey work, topographic pickup, monitoring surveys and machine control support |
| Instrument Compatibility | Suitable for Leica, Trimble and other compatible total stations when the correct prism constant is applied |
What’s Included
- GRZ122 360 Prism
- Leica 12 mm spigot mount configuration
Works With
The GRZ122 360 Prism works with robotic and manual total station setups used across Australian construction, civil, rail, mining and infrastructure projects, including:
- Leica total stations using the correct +23.1 mm prism constant
- Trimble total stations using the correct -11.3 mm prism constant
- Compatible Topcon and Sokkia total stations with the correct user-applied prism constant
- Leica-style pole and carrier systems using a 12 mm spigot mount
- ATR and robotic total station workflows
- GNSS + total station integrated survey workflows
- Construction set-out and topographic survey workflows
- Rail surveying, monitoring and machine control support tasks
Australian Support
Terra360 supplies survey equipment for Australian construction, civil, rail, mining and infrastructure teams, with local support before and after purchase. The GRZ122 360 Prism is backed by the applicable Australian warranty terms for this product, with Terra360 acting as your point of contact for warranty, compatibility and product support.