Use mouse wheel, arrow keys or drag thimble to rotate vernier . This article delves into the design and working principles of the vernier caliper , explains how it enables extremely accurate measurements and compares two of the most common types on the market today—stainless steel and carbon fiber vernier calipers . Learn what a vernier calliper is, how it works, and how to use it for measuring linear dimensions and diameters. Find out the least count, zero error, and applications of vernier callipers with solved examples and diagrams. Vernier Calipers can measure small lengths more accurately. Here is the diagram, least count, use and readings of a Vernier Caliper .