Measurement tools are instruments with a fixed form, used to reproduce or provide one or more known quantities. According to different uses, measuring tools can be divided into the following categories:
Single-value measuring tools
These are measuring tools that can only represent a single quantity value. They can be used to calibrate and adjust other measuring tools or as standard quantities for direct comparison with the measured quantities, such as gauge blocks, angle gauge blocks, etc.
Multi-value measuring tools
These are measuring tools that can represent a set of similar quantity values. They can also be used to calibrate and adjust other measuring tools or as standard quantities for direct comparison with the measured quantities, such as line gauges.
Specialized measuring tools
These are measuring tools specifically designed to inspect a particular parameter. Common examples include: smooth limit gauges for inspecting smooth cylindrical holes or shafts, thread gauges for determining the acceptability of internal or external threads, inspection templates for assessing the acceptability of complex shape surface profiles, and functional gauges that use simulated assembly pass-through to inspect assembly precision, etc.
