For Over 150 Years, The Standard of Accuracy
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Laser InterferometerLaser interferometry is a well established method for measuring distances with great accuracy. Pratt & Whitney laser-based measuring systems use laser interferometers to deliver exceptional precision and accuracy. With instrument uncertainty to 2 millionths of an inch (50 nanometers), the Labmaster Universal Model 175 is the most widely used dimensional interferometer in industry today. This laser-based universal length measuring system (ULM) has been developed by Pratt & Whitney for gage calibration laboratories that need to precisely measure length, outside diameter, inside diameter, pitch diameter, lead, major/minor diameter, taper, linear displacement, and thickness of precision gauges or precision parts.
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