The Tester Approves thread (see first post)

I once used someone's digital calliper and with every measurement the number was different

Sometimes that's user error🙂 But yeah, lower quality Chinesium ones can be more prone to error because the mechanical construction is less precise, so they move more when you apply inconsistent contact load. That applies equally to Vernier types as it does to digital. Most cheap digital ones use relative scales, and they can lose steps. The Mitutoyo Absolute Digimatic doesn't suffer from this.

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