Why This Instrument
The CP-1 Circular Prism is designed for surveyors who need a larger, more dependable target than a mini prism for control, traverse and high-accuracy total station work. Its 62 mm prism diameter provides a stronger EDM return signal, which helps improve target acquisition and measurement reliability across demanding field conditions.
This model is particularly suited to control surveys, traverse work, construction set-out and monitoring applications where a larger prism target gives crews more confidence in the measurement. Many surveyors prefer GPR111-style circular prisms over mini prisms for control work because the larger target size supports stronger EDM performance and easier sighting on site.
Why This Instrument
- 62 mm circular prism diameter: Provides a larger optical target than mini prisms, making it easier to sight and better suited to control, traverse and high-accuracy measurement work.
- Stronger EDM return signal: Helps total stations lock onto the target more reliably, particularly during control surveys, monitoring surveys and longer setup workflows.
- Leica 0.00 mm prism constant: Allows direct use with Leica total station workflows where a zero prism constant is required for accurate measurement.
- Trimble -34.4 mm prism constant: Supports Trimble total station workflows when the correct -34.4 mm prism constant is applied in the instrument settings.
- Leica 12 mm spigot mount: Provides a secure mounting option for Leica-style survey poles, carriers and compatible prism accessories.
- Copper or silver coating options: Gives surveyors a choice of reflector coating based on their preferred instrument setup and field measurement requirements.
- Suitable for machine control and alignment: Supports accurate positioning tasks where clear target definition and consistent EDM response are important.
- Better suited than mini prisms for control work: The larger target size makes the CP-1 a practical choice for surveyors completing control networks, traverse runs and general total station measurements where accuracy matters.
| Product | Circular Prism |
| Part Number | CP-1 |
| Prism Type | Full-size circular surveying prism |
| Prism Diameter | 62 mm |
| Primary Use | Control surveys, construction set-out, topographic surveys, monitoring surveys, traverse work, machine control and alignment |
| Distance Measurement | Designed for general total station measurements where high accuracy and strong EDM return are required |
| Prism Constant — Leica | 0.00 mm |
| Prism Constant — Trimble | -34.4 mm |
| Reflector Coating | Copper or silver coating options |
| Mount Type | Leica spigot |
| Spigot Size | 12 mm |
| Compatible Workflows | Control survey networks, traverse observations, construction set-out, monitoring surveys, topographic pickup, machine control support and alignment tasks |
| Instrument Compatibility | Suitable for Leica, Trimble and other compatible total stations when the correct prism constant is applied |
What’s Included
- CP-1 Circular Prism
- Selected reflector coating: copper or silver
- Leica 12 mm spigot mount configuration
Works With
The CP-1 Circular Prism works with common total station setups used across Australian construction, civil, engineering, rail, mining and infrastructure projects, including:
- Leica total stations using the correct 0.00 mm prism constant
- Trimble total stations using the correct -34.4 mm prism constant
- Compatible Topcon and Sokkia total stations with the correct user-applied prism constant
- Leica-style prism carriers and pole systems using a 12 mm spigot mount
- Control survey and traverse workflows
- Construction set-out and topographic survey workflows
- Monitoring survey setups
Australian Support
Terra360 supplies surveying equipment for Australian construction, civil, mining, rail and infrastructure teams, with local support before and after purchase. The CP-1 Circular 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.