Height gauges are a type of measuring tool used to measure the height of an object or the distance between two surfaces. They are commonly used in manufacturing, machining, and engineering applications to ensure accuracy and consistency in the production of parts and components.

A height gauge typically consists of a vertical column or post, with a horizontal arm or beam that can be adjusted up and down the column. The arm has a measuring tip or scriber that can be moved up and down to make contact with the surface being measured. The height measurement is read from a scale on the column or a digital display.

There are several types of height gauges, including:

1. Vernier height gauges: These gauges have a vernier scale that allows for precise measurement of height to a fraction of a millimeter.

2. Dial height gauges: These gauges have a dial indicator that shows the height measurement in a clear, easy-to-read display.

3. Digital height gauges: These gauges have a digital display that shows the height measurement in digital format. They typically have a high level of accuracy and are easy to use.

4. Laser height gauges: These gauges use a laser to measure the height of an object or surface. They are often used in applications where non-contact measurement is required.

Height gauges can also come in a variety of sizes, ranging from small handheld gauges to large floor-mounted models. The type of height gauge used will depend on the specific application and level of precision required.