A dial indicator, also known as a dial gauge, is a type of measuring tool used for precision measurements in manufacturing, engineering, and other applications. It consists of a cylindrical gauge with a rotating dial and a needle that moves along a calibrated scale as the gauge measures the dimension of an object. The dial displays the measurement in both decimal and fractional units.

Dial indicators are commonly used in a variety of applications, including checking the alignment of machine parts, measuring the runout of a rotating shaft, and checking the flatness of a surface. They can be mounted on a stand or a magnetic base for stability and ease of use, and are available in different ranges and resolutions to suit different measuring needs. Dial indicators are known for their high accuracy and repeatability, making them a reliable choice for precision measurements.