D-205  PRECISION  LEVEL

The Model D-205 Precision Level is an extremely precise instrument, designed for applications requiring maximum accuracy on small surfaces or in confined working areas.

• Extremely accurate horizontal reference with 5 arc seconds sensitivity
• Maximum precision for tool makers, machinists and inspectors
• Finished in Ivory and Chrome
• Complete with finished wood carrying case

The 5 inch (127 mm) long level base, machined from hardened steel, is relieved at each end to provide a 3.50 inch (88 mm) bearing face.  It is then lapped flat to within 0.000 06 inch (0.5 μm).  The kinematically mounted spirit bubble tube has a sensitivity of 5 arc seconds per division.  A metal cover with a glass window protects the spirit bubble tube and mount.

The precision block level can be used as a comparator for measuring and checking small linear differences between gage block combinations or gage blocks and a work piece. By using a horizontal table and bridging with the instrument, it is possible to check a difference of 0.000 005 inch (or 0.5 μm per 50 mm).

The Model D-205C is relieved 3.5 inch (88 mm) in the center with each end lapped flat to within 0.000 02 inches (0.5 μm).