As usual it depends on the quality. The very best analogue used to be Tesa (Swiss) brand, with very accurate racks and gears, But Verniers are not considered accurate in engineering compared to Micrometers etc.Originally Posted by Black Beard
This is a reply I found on another forum which explains it well, and save me some typing;
"I hope you don't confuse accuracy with resolution!
Accuracy has nothing to do with digital or analog. It is repeatability and certainty (region of trust) you get with that device. Also it should ideally not depend on the user (force etc.).
I personally don't trust a caliper beyond 0.025mm.
Those 0.025mm is what you can get with a vernier caliper (supposed I find my glasses). Be it digital or dial, its only a matter of convenience. The rest is only resolution or fake accuracy.
Bear in mind, that the Mitutoyo digital calipers do have an accuracy of 0.03mm over 150mm. The electronics inside are not steady, they do deviate from the zero error within a short distance (2.5mm or such, depending on the construction). The same is true for the gears inside of a dial caliper.
In short, digital or dial is only a means to display a value. Its not accuracy-related."
To The O.P, Get a set of Mitutoyo Digimatics off the bay, always several tidy used ones at good savings.
ATB, Ed
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