Micrometers are instruments for precision dimensional gaging consisting of a ground spindle and anvil mounted in a C-shaped steel frame.  Noncontact laser micrometers are also available

Instrument calibration services test equipment and calibrate them to various standards.  

Dimensional gages and instruments provide quantitative measurements of product or component dimensional and form attributes such as wall thickness, depth, height, length, inner diameter (ID), outer diameter (OD), taper or bore.

Calipers typically use a precise slide movement for inside, outside, depth or step measurements. Some caliper types are used for comparing or transferring dimensions.

Masters and setting gages provide dimensional standards for calibrating other gages.

Depth gages are used to measure of the depth of holes, cavities, or other component features.

Plug and pin gauges are used to compare hole and slot dimensions or locations to specific tolerances. This product area includes go gauges and no-go gauges. 

Air gages use pneumatic pressure and flow to measure or sort dimensional attributes.

Height gages are used for measuring the height of components or product features.

Thread gages are dimensional instruments for measuring and/or verifying thread size, pitch or other parameters.

Bore and ID gages are designed for internal diameter dimensional measurement or assessment.

Optical comparators are instruments that project a magnified image or profile of a part onto a screen for comparison to a standard overlay profile or scale. 

Ring gages are used for go / no-go assessment compared to the specified dimensional tolerances or attributes of pins, shafts, or threaded studs.

Snap gages are used in production settings where specific diametrical or thickness measurements must be repeated frequently with precision and accuracy.

Calibration instruments use electrical signals or physical quantities to calibrate sensors and meters. Devices that produce electrical signals can serve as precise meters for sensor calibration, or send output signals to other devices