Introduction to Comparators
All measuring instruments are comparators, ranging from a simple scale to a complex instrument incorporating its own standard scale. For an engineering metrologist, a comparator is an instrument used for the measurement of diameters or lengths on gauges and components, using slip gauges as a standard.
Use of comparators in metrology
- Comparator is required in mass production and mass production would be impossible if component parts could not be produced to close dimensional tolerances.
- Use of line standards such as vernier and micrometer calipers requires a considerable degree of skill if consistent results are to be obtained.
- Where dimensions must be checked with high degree of precision and speed in the mass production.
- When many dimensions are to be checked, in a very short time.