TO-375 - Volume Change Apparatus and Length Comparator
Length Comparator with reference bar
The apparatus consists of a mold of 75 x 75 x 285mm gauge length (distance between innermost points of reference points) with base plate and four reference points of standard length.
Supplied with TO-374 Length Comparator, which consists of a frame with adjustable cross head. The base is a stainless steel circular platen with recessed seating and 300mm + 0.5mm long steel reference bar with coefficient of thermal expansion less than 2 x 10-6mm/°C with 6mm diameter steel balls mounted at the ends. The frame is supplied with TO-072 0.002 x 5mm dial gage or TO-072-DG 0.001 x 5mm digital gage.