Monitoring Ball Prisms Ø 30mm and Ø 1.5“ (38.1mm)

Very precisely manufactured glass mini prisms in Sphere holders made of special stainless steel that reacts to magnets. The spheres are available with Ø 30 mm or 1.5" (38.1 mm) are available. Distance measurements up to 1,000 m are possible with spherical prisms, for measurements over 400 m we strongly recommend the 1.5" sphere.

The prism constant must be set on the total station be set with the correct sign. Only then will the measured inclined distance be corrected by this amount within the device. We specify the Leica offsets and the offsets of other instrument manufacturers here.
The specified ranges are dependent on the device and weather conditions.

For the transport and storage of our ball prisms, we recommend the case no. 46-1468.

Both versions offer the following advantages:

•      Ball manufacturing accuracy: ± 0.05 mm
•      Grinding accuracy: 2"
•      Silver-coated back of the prism
•      Prism constant accuracy ≤ 0.1 mm
•      Tolerance center deviation prism: ≤ 0.2 mm
•      Shock-resistant and waterproof
•      Prism height 30.8 mm

To prevent accidental drops, the ball prisms are also available with a drop safety device.
(see Ball prisms with drop safety device)


to overview monitoring ball prism