Types of Comparators (metrology)

Comparators are one form of linear measurement device which is quick and more convenient for checking large number of identical dimensions.

Comparators normally will not show the actual dimensions of the work piece. They will be shown only the deviation in size.

Comparators are Classified into 4 types

1. Mechanical comparators
   • Dial Indicator
   • Read type mechanical comparator
2. Electrical comparators
   
   • Transducer
   • Display device as meter
   • Amplifier
3. Optical comparators
4. Pneumatic comparators