Rotating components of machinery such as engines, generators and power transmissions are continuously subjected to torsional forces, resulting in torsional vibrations. The torsional vibration measurement is fully integrated in to the OROS 3-series analyzers. Up to 6 tach inputs oversampling at 6.4MHz, 1,024 pulses/rev and 40,000 RPM (with a 60 pulse/rev), makes the OROS 3-Series analyzers ideally suited for rotating measurements.