meter rod

precise leveling rod

A precision leveling rod; the graduations are on a ribbon of special alloy whose precision is little affected by temperature; the ribbon is maintained under constant tension.
References in periodicals archive ?
This led to an unsatisfactory hybrid situation, with Ritchey's salary being paid by various expedients, including the selling of platinum -- possibly a standard meter rod -- by the observatory
Contract notice for The Fully Automated Cnc Machine For The Production Of Many Parts Of The Shaft / Axle With 6 Meter Rods Quality Control System And Loading System.