Edmunds Twin-Head

The Twin-Head Gage Block Comparator is designed and manufactured to handle the full range of gage block sizes and calibrates at a resolution of .0000001 inch.

Resolutions of .0000002 inch, .0000005 inch or .000001 inch are also available.

Special Features


  • Two size ranges are offered: a 20-inch Ultra-Precision Twin-Head Gage Block Comparator for gage blocks from 0 to 20 inches (0 to 508 mm), and a 5-inch version designed to calibrate up to 4-inch (101 mm) blocks.
  • Both units provide true point-to-point measurement. They feature two heads with individual power supplies, amplifier circuits and controls. A panel control can switch the comparator to single head operation when desired.