The digital micrometer is the most recent innovation in micrometer technology. Digital micrometers are able to take extremely accurate measurements; most can measure to 0.0005 inches and 0.001mm. Measurements can be taken in both metric and imperial units.
At any time, the user can convert their readings from one system to the other by pressing the “mm/inch” or “unit” button. A zero button also allows the unit to be zeroed at any point.
The feature is ideal for comparative and incremental measurements. Readings provided by digital micrometers are electronically generated and shown on an LCD display. The LCD display maybe instead of, or in addition to, the scales normally found on a micrometer.
- Outside Micrometer – The outside micrometer is the most commonly used type of micrometer. It is used to measure external dimensions such as the outside diameter of an object.
- Inside Micrometer – Inside micrometers are used to measure inside dimensions like the inside diameter of a hole or tube. Inside micrometers are used to measure inside dimensions like the inside diameter of a hole or tube.
- Caliper-Type Micrometer – Caliper-type inside micrometers have measuring jaws similar to those found on a dial caliper or vernier caliper.
- Tubular Micrometers and Rod Micrometers – Both tubular micrometers and rod micrometers are placed within the space to be measured and extended until the measuring faces contact the edges of the space to be measured. Rod micrometers come with a selection of measuring rods which, when attached to the tool, extend the measuring capabilities of the micrometer. Some rod micrometers have a handle that connects to the instrument and helps the user to measure inaccessible or difficult-to-reach spaces.
- Depth Micrometer – Depth micrometers are used to measure the depths of holes, slots, and steps. They come with a variety of interchangeable rods of different lengths so that they can be used to measure a range of depths.