Technical Data:
Magnification: 7x
Sesitivity of level: 20"/2mm
Plummet accuracy: 1:30000
Accuracy at 100m: +/-3.3mm
Accuracy at 300 ft: +/-0.01 ft
The Wild ZNL Zenith and Nadir Plummet is used for vertical plumbing through great distances and is invaluable to the builder, the engineer and the surveyor when working through heights which are too large for the normal theodolite plummet. Being detachable from the tribrach the ZNL (which has a plumbing accuracy of 1/30 000) can be centered over or under the required point and then replaced by the theodolite with guaranteed forced-centering. For some tasks, particularly those connected with large constructions, the ZNL can be used as an independent instrument. For the surveyor it is particularly useful when working on towers.