Height gauges, also called gages, are precision measuring instruments that travel on a vertical column (also called the beam) to measure and/or mark the vertical distance from the base of an object in fine units. Turning a calibrated screw, or one or more feed wheels changes the vertical position of the gauge and its attached pointer. Recorded rotations are read from a scale, a dial, counters, and/or an electronic display. A screw clamp holds the pointer to the gauge. The pointer is typically sharpened to act as a scriber, and can be used to mark position on a work piece by scratching its surface. On compatible units, an electronic touch-signal probe may replace the scriber. Height gauges are typically used in manufacturing, machining, and mechanical engineering.

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