Classification of Comparators

The comparators are classified as below:

1. Mechanical comparator
➞ Dial Indicator
➞ Sigma comparator
➞ Reed-type comparator
➞ Johansson mikrokator

2. Mechanical-Optical Comparator
➞ Optical Lever
➞ Zeiss Optimeter
➞ Zeiss Ultra Optimeter
➞ Zeiss Optotest comparators

3. Electrical and Electronics Comparator

4. Pneumatic Comparator

5. Fluid displacement Comparator

6. Projection Comparator