Description
The Topcon RS90N reflective sheet target 90 x 90 mm (RS90N-K kit) is a reflective target made by Topcon and also sold under the Sokkia brand (part number 210210041-SURSK (RS90N); 210210040 (RS90N-K)).
Its absolute prism constant is 0.0 mm, which is +34.4 mm on the Leica scale.
Specifications
| Model: | RS90N |
| Manufacturer: | Topcon |
| MPN: | 210210041-SURSK (RS90N); 210210040 (RS90N-K) |
| Status: | Current |
| Absolute constant: | +0.00 mm |
| Leica constant: | +34.40 mm |
| Constant source: | Manufacturer documentation |
| Maximum range: | 500 m (RS90N-K: 1.3-500 m (beam within 30° of sheet; GT series datasheets)) |
| ATR / tracking range: | 50 m |
| Mount: | Adhesive |
| Last verified: | 21/10/2026 |
Sources
Topcon RS90N reflective sheet target 90 x 90 mm (RS90N-K kit) FAQ
Below is a list of frequently asked questions about Topcon RS90N reflective sheet target 90 x 90 mm (RS90N-K kit).
What is the prism constant for the Topcon RS90N reflective sheet target 90 x 90 mm (RS90N-K kit)?
The absolute prism constant for the Topcon RS90N reflective sheet target 90 x 90 mm (RS90N-K kit) is 0.0mm. The Leica constant is 34.4mm.
Can I use the Topcon RS90N reflective sheet target 90 x 90 mm (RS90N-K kit) with a Leica instrument?
Yes, just set the prism constant to 34.4mm.
