Description :
The instrument consists of two aluminium frames connected by a link. The frames are fitted with self centering collets. One of the frames is fitted with a micrometer screw which reads to 0.01mm and main scale of 10-0-10mm. On one end a sensitive spirit level is pivoted to one of the frames, the other end rests on the point of a micrometer screw fitted in the other frame. Provision for fixing on ceiling is provided. Supplied with 1 meter of wire-2 nos. and a cylindrical tension weight 1.3kg approx.