Transparent choice
The ideal tribrach for your application

• All original tribrachs comply with the strict specifications and quality standards of Leica Geosystems. Your choice should ideally be made according to your individual accuracy requirements.
• The hysteresis of the Professional 5000 Series tribrachs is guaranteed to a maximum of 1″ (0.3 mgon) or better.
• The foot screws are maintenance free and ensure a movement that is smooth and free of play, even in the most severe environmental conditions.
• The tribrachs in this series are recommended for all tasks that require angle measurements of under 3″.
• Due to the minimal hysteresis, we recommend the use of the Professional 5000 Series for all motorized instruments.

The torsional rigidity of the original The accuracy with which a tribrach returns to its starting position once the instrument has stopped is called torsional rigidity or hysteresis. This hysteresis is the relative movement between the top plate and the base plate of a tribrach that occurs through the rotation of a TPS instrument. The hysteresis has a direct influence on the angular accuracy of the instrument – and that speaks for the original. To optimize the hysteresis as Leica Geosystems has done is complex and calls for the highest precision: a movement of the top plate to the base plate of 0.3 μm corresponds to an angle error of 1″. Especially motorized instruments with their high acceleration and brake power require tribrachs with very high torsional rigidity.