Use our optical micrometers to precisely measure the deviation from a line of sight. These micrometers fit our transits and levels, as well as most of our alignment telescopes (if you use the adapter for 2¼” diameter barrels). The 160 Series is a dual-axis model which allows measurements in two orthogonal planes simultaneously. Our micrometers come in either English or Metric units. Our 190 Series micrometers are also available with a range of ±0.020″, giving you finer resolution measurements over a shorter range.