Bi-directional direct read measurement system

摘要

Disclosed is a measurement system for providing a direct reading of a position on either side of a reference position. The system comprises a reader head including a reader element configured to move laterally with respect to a calibrated reference member for making a measurement relative to a reference position. The measurement system also includes mode display apparatus for increasing or decreasing the measurement which is displayed as the reader element moves away from or toward a selected side of the reference position.