Caliper is a instrument of linear meaurement built with one rule and one cursor that slides on that. It's was designed to external linear measures by contact, It can also meausre internal dimensions, depths, saliences among others.
The main scale of this simulator is graduated in centimeter, that is divided in tenths (millimeter). The vernier divide the millimeter in fifty (1/50), marking the 0.02mm (two hundredths of a millimeter).
To comprehend the science of measurement with caliper, we suggest that you read and interact with the pages: