Vernier Caliper

A Vernier caliper is a precision measuring tool with a fixed main scale and a sliding Vernier scale, allowing for highly accurate readings of length, depth, and diameter, far beyond a standard ruler’s precision. It works by using the slight difference between divisions on the main scale and the Vernier scale to interpolate measurements, often down to two decimal places (e.g., 0.02mm or 0.05mm).