mitutoyo 500-196-30 mitutoyo 500-193-30 mitutoyo 500-197-30 mitutoyo 500-196 mitutoyo 500-752-20 mitutoyo 500-753-20 mitutoyo 500-196-30 digital caliper mitutoyo 500-197-30 electronic digital caliper mitutoyo 500-196-30 advanced onsite sensor mitutoyo 6 digital caliper 500-196-30