Theodolite is used for measuring the horizontal and vertical angles.Here we are going to learn about different transit theodolite parts.

Transit theodolite parts ( Parts and fuctions)

Telescope of theodolite

The telescope is the major components of theodolite, Telescope is mounted on a spindle or horizontal axis or trunnion axis. Internal focusing type telescope is widely used.

Vertical Circle of transit level

Vertical circle is another important theodolite parts, a circular graduated ring is attached to the horizontal. With the help of vertical circle, we can measure the vertical angle of the line of sight with the horizontal axis.

Index frame or T frame

Two verniers are fitted to read the vertical circle. Clip screw is used for slight adjustment. Altitude bubble is placed at the top of index frame.

Transit level head

Transit level head consists of two parallel triangular plates. These triangular plates are called tribrach plates. It is another essential theodolite parts.

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