Inside Dimension (ID) Measuring Instruments

The Standard of Accuracy


Labmaster® Universal Model 175

The most popular ID/OD instrument in the world.  Automatic probe movement with a push of a button.  High accuracy is maintained by its laser interferometer, zero Abbe offset design, and large measuring table with swivel, center, tilt, and elevation control knobs.

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Universal Supermicrometer® Model 501 & 504

The definitive bench micrometer, the Universal Supermicrometer (USM), offers the advantage of being two instruments in one, by providing the ability to measure both internal and external parts. 

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Internal Supermicrometer®

The Universal Supermicrometer Model 504 is a direct replacement to the Internal Supermicrometer Model TG2100 and Model G2100.  Click here for more information.