Description

They are used for accurate measurement of vertical distances or displacements. It is specially required when the test piece to be measured is not easily accessible or physical contact introduce error. A cathetometer essentially consists of a telescope fitted with an achromatic objective of 178mm fl. And025mm clear aperture. The 90 cross line reticule has provision for centering.With the auxiliary lens provided along with the instruments the telescope from 40mm to infinity. The scale is graduated every half mm on an inlaid metal strip. A vernier and micrometer reading to 0.01mm are provided.

The total transverse of the cathetometers is 1000mm.