The absolute type sensor enables a slim design and resistance against lateral loads via 2-point holding structure. The unit provides measurement resolution of 0.1μm and an accuracy of 1μm without value skipping. The unit is also rated to exceed 100 million strokes of usage with resistance to push-up, vibration, and shock Vs. the competitors. It also provides a dual display for enhanced visibility and easier operation. The main display is white with the green sub-display creating outstanding visibility and rich expression. “Pushing up” error can be detected via an alarm setting. The unit also provides a “Copy Function” for each category which reduces setting time.