DESCRIPTION :-
• A specially designed apparatus capable of greater degree of sensitivity and accuracy.
• Two cast metal rectangular frames hinged together parallel to each other to allow only vertical relative motion, with a spirit level fixed on a cross-bar pivoted across the frames for noting the reference point.
• One frame has vertical scale 10-0-10 mm with a micrometer head reading to 0.01 mm for adjusting the spirit level.
• Each frame has a self centering chuck at Its top for holding wires and load hooks at the bottom.
• Also Included are celling bracket, a counter polse weight and a set of two wires, one each of brass and steel.
• The relative displacement between the two frames can be known from the micrometer reading after adjusting the bubble spirit level.