Description
The Seco 360 Robotic Prism Assembly (Topcon) is a 360° prism made by Seco (part number 6401-00-YEL).
Its absolute prism constant is 0.0 mm, which is +34.4 mm on the Leica scale.
Specifications
| Model: | 6401-00 |
| Manufacturer: | Seco |
| MPN: | 6401-00-YEL |
| Height Offset: | 77.0 mm |
| Absolute constant: | +0.00 mm |
| Leica constant: | +34.40 mm |
| Constant source: | Manufacturer documentation |
| Prism diameter: | 35 mm |
| Coating: | copper |
| Equivalents: | Designed for Topcon |
| Last verified: | 21/10/2026 |
Sources
Seco 360 Robotic Prism Assembly (Topcon) FAQ
Below is a list of frequently asked questions about Seco 360 Robotic Prism Assembly (Topcon).
What is the prism constant for the Seco 360 Robotic Prism Assembly (Topcon)?
The absolute prism constant for the Seco 360 Robotic Prism Assembly (Topcon) is 0.0mm. The Leica constant is 34.4mm.
Can I use the Seco 360 Robotic Prism Assembly (Topcon) with a Leica instrument?
Yes, just set the prism constant to 34.4mm.
What is the height offset of the Seco 360 Robotic Prism Assembly (Topcon)?
The height offset is 77.0mm.
