Digital caliper is one instrument of linear measurement dopted of one cursor that slides in a ruler. It was concebed to take linear external measures by contact. It can also measure internal dimensions, depths, rebounds among others, eliminating the need of interpretation of the reading.
Each instrument has your positive and negative points. I will show you some of them coparing the dials (time markers) analogical and digitals.
The analogic dial if the one with pointers. It is analogic, because we interpretate the value of the hour comparing the position of them with the display and the indication is a continuous function, this way we put a lot of efforts in terms of interpretation on this simple act.
The digital dial has no pointers, we read directly the value of the hour in the display. This approach eliminates the need of interpretation of the value of the hour that stays more uniform (doesn't matter who is gonna read) and request much less efforts.
The previous paragraphs induce hasty conclusion that the digital dial is preferable than the analogic one. However this conclusion is not, by the way, the most correct one.
What time is it is one information not so relevant to many people. Usually, what we need is to know how long it takes to get until the time that interest to us. How long does it take to the end of the class or to the beggining of the movie theather, for example. The analogic dial allows interpretation of this information with no efforts. It eliminates the need of calculations.
Looking to this optic, the analogic caliper is preferable in the production lines / machining, because it helps the professional to make calculations of how much material still must be removed, for example. The digital caliper has your space in the sections like the: quality control, inspection and metrology.
For refference, teh scales of this simulator are graduated in millimeter and in tenth inch.
One eletronic device increment the travelled distance by the cursor and that has in one dial of liquid crystal. One advantage of this geometry is to allow the possibility of commutating the measure in hundredth millimeter, tenth thousandth inch and fractional inch. Another advantage is the possibility of adjustment in any point passing to Um aparato eletrônico incrementa a distância percorrida pelo cursor e a apresenta em um mostrador de cristal líquido. Uma vantagem desta geometria é permitir a possibilidade de comutar a medida apresentada entre millimeter centesimal, polegada décimo-milesimal e fractional inch. Outra vantagem é a possibilidade de ajustar o instrumento em qualquer ponto going to consult the difference between measures, facilitating teh inspection of teh tolerance of the many pieces with no need of interpretation of each one, for example.
The digital caliper, as a rule, cannot substitute the micrometer with resolution thousandth of inch , because its exactitude (imprecision between value measured and the real) is bigger than of the resolution one (smaller measure displayed by one instrument).