What type of measurements does a thickness gauge typically provide?

A thickness gauge is specifically designed to measure the thickness of materials, which relates closely to the concept of clearances. This type of measurement is crucial in various fields, including manufacturing, construction, and quality control, where precise thickness is important for ensuring that components fit together correctly or meet specified tolerances. By providing accurate measurements of thickness, the gauge helps ensure that materials meet safety and performance standards.

The other mentioned options do not align with the primary function of a thickness gauge. Weight measurements involve assessing how heavy an object is, which thickness gauges do not provide. Volume measurements pertain to the amount of three-dimensional space an object occupies and are not measured with a thickness gauge. Similarly, air pressure measurements deal with the force exerted by air within a given space, which is unrelated to the purpose of a thickness gauge. Therefore, the measurement of clearances, represented by the thickness of materials, is the correct context for the function of a thickness gauge.