Fowler Electronic Height Gage Features include.. Scale not affected by oil, dust, chips, magnetism, shock, ect. Direct RS-232 output The Sylvac measuring system is exceptionally fast (60" per second traverse) and is the most reliable and maintenance free system ever created for measurement. Technical Data Includes... Measuring Range: 0-24" / 600mm True inch/metric conversion. Accuracy: .002" Resolution: .0005" / .01mm Repeatability: .004" Base Size: 5.6" wide x 6.8" length 8mm probe shank