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In 1994, carbon fiber legs were introduced into the range. [2] In 2004, Gitzo introduced a new "basalt" series with tubes manufactured from silica fibers drawn from crushed and melted basalt rock, touting its vibration-damping properties. [5] [13] [14] By 2015, carbon fiber was the sole leg material offered. [12]
Leveling of an instrument is done to make its vertical axis adjusted with respect to the apparent force of gravity at the station. For two spirit vials at right angles: Bring one of the level tubes parallel to any two of the foot screws, by rotating the upper part of the instrument.
These leveling instruments as used in surveying to measure height differences over larger distances. A surveyor's leveling instrument has a spirit level mounted on a telescope (perhaps 30 power) with cross-hairs, itself mounted on a tripod. The observer reads height values off two graduated vertical rods, one 'behind' and one 'in front', to ...
A level staff, also called levelling rod, is a graduated wooden or aluminium rod, used with a levelling instrument to determine the difference in height between points or heights of points above a vertical datum.
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Precise level designs were often used for large leveling projects where utmost accuracy was required. They differ from other levels in having a very precise spirit level tube and a micrometer adjustment to raise or lower the line of sight so that the crosshair can be made to coincide with a line on the rod scale and no interpolation is required.
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