Young?s Modulus Apparatus, Searle?s Pattern This apparatus is capable of greater sensitivity and accuracy. It consists of two iron frames connected by a link. The frames are fitted with self centering chucks. An accuracy cut micrometer screw to read to 0.01mm and main scale of 0-10mm is fitted in one frame. One end of a sensitive spirit level is pivoted to one of the frames and the other end rests on the point of a micrometer screw fitted on the other frame. Qty :