Similarly to the stability of the tripod, that of the tribrach is a significant factor in measurement accuracy. The torsional rigidity, the most important criterion of a tribrach, is constantly controlled and tested during its production. The maintenance-free foot screws of the Leica Geosystems tribrach provide movement that is always smooth and free of play, even after years of use. The precise alignment of the support area to the base plate of the instrument assures extremely accurate forced centring. The optical plummet is so robust that the need for adjustment during the entire lifetime of the tribrach is practically unnecessary. Its construction predestines the tribrach for all applications, including extreme temperatures and high dust and humidity. 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. Hysteresis maximum of 1 (0.3 mgon) or better. Hysteresis maximum of 3 (1.0 mgon). Hysteresis maximum of 5 (1.5 mgon). The torsional rigidity of the original. 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 direct influence on the angular accuracy of the instrument and that speaks for the original. To optimise the hysteresis as Leica Geosystems has done is complex and calls for the highest precision: a movement of the upper plate to the lower plate of 0.3m corresponds to an angle error of 1. Especially motorised instruments with their high acceleration and brake power require tribrachs with very high torsional rigidity. The item “Original Leica total station tribrach GDF321″ is in sale since Wednesday, October 17, 2018. This item is in the category “Business & Industrial\Test, Measurement & Inspection\Levels & Surveying Equipment\Total Stations & Accessories”. The seller is “galaxysurvey” and is located in Shanghai. This item can be shipped worldwide.

• Model: GDF321
• Country/Region of Manufacture: Singapore
• MPN: Does Not Apply
• Brand: Leica