Which device is commonly used to measure internal, external, or depth measurements?

Vernier calipers are a versatile measuring instrument widely used in engineering and manufacturing. They can effectively measure internal, external, and depth dimensions with high precision. The design of vernier calipers includes a main scale and a sliding vernier scale, enabling users to read measurements to a fraction of a millimeter or inch.

The internal jaws of the vernier calipers are specifically tailored for measuring the internal dimensions of objects, while the external jaws can grasp the outer edges for external measurements. Additionally, there is a depth rod that extends from the main body, allowing for the measurement of depth. This multifunctionality makes vernier calipers an essential tool for tasks that require precise dimensional measurements.

In contrast, other measuring devices, like micrometers and screw gauges, are typically more specialized for specific types of measurements and do not have the same range of capabilities as vernier calipers. Caliper gauges, detailed in this context, might not be as widely recognized as vernier calipers for handling all three measurement types effectively.