Rene Co.'s 8400K Optical Micrometer measure the width of scratches and the vertical depth of surface features. The kit includes a Microm-eter with digital display, three bases for different surfaces, ...

The capability of a vernier or digital caliper depends on the accuracy of the scale. A caliper's design, rigidity of the beam, squareness and parallelism of the jaws to the scale, and general ...