Which device would you use to measure depth accurately?

To measure depth accurately, the most suitable device is a depth gauge. A depth gauge is specifically designed to measure the vertical distance or depth of a feature in a workpiece, such as holes or recesses. It typically features a slender probe that extends down into the hole, allowing for precise measurements and ensuring that the reading is accurate to the required specifications.

Depth gauges can come in various forms, such as digital or dial types, and are often equipped with a flat base for stable measurements against the surface of the material. This specialized design enhances their effectiveness in tasks where depth needs to be measured precisely, making them the preferred choice in engineering and machining applications.

While calipers and micrometers are also precision measuring tools, they are not specifically tailored for measuring depths in the same way a depth gauge is. An absolute encoder, on the other hand, is an electronic device used for providing information about an object's position rather than directly measuring depth. Therefore, for the task of accurately measuring depth, a depth gauge is the most appropriate device.