How Does a Vernier Caliper Measure the Inner & Outer Diameter & Depth of an Object?
Vernier calipers are pieces of equipment that are designed to take precise measurements of spherical objects. Their jaw formation allows you to measure the inner and outside diameter, while the bar the jaws are connected to allows you to measure the sphere's depth.
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Inner Diameter
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Inner diameter is measured with the inner jaws. These are jaws that are smaller than the outer diameter jaws, and can therefore fit inside a pipe or other sphere. To use them, the user unscrews the locking pin, places the jaws into the sphere, opens them as far as they can go, then screws the locking pin shut again. The ruler will show what the inner diameter is.
Outer Diameter
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The outer diameter is measured using the outer jaws, directly opposite the inner jaws. Rather than going inside to measure, however, the outer jaws clip to the outside edges of the sphere.
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Depth
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The depth measuring blade is located at the end of the vernier caliper. To use it, the user simply needs to place the caliper into the sphere until the blade touches the bottom. Once it does, the length displayed on the end the user is holding will be equal to the sphere's depth.
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