Seismic type velocity transducer
In machines where the shaft sends a vibration to the housing with little damping—that is, where the vibration amplitudes in the housing are high—the A seismic type velocity transducer is utilized. Velocity Transducers guarantee longevity and dependability thanks to their non-friction moving parts. You can use this instrument in hot areas of turbines where high temperatures interfere with other sensors because it was created for industrial usage on fixed turbines. The low impedance, high-level output that can power AC meters, recorders, and control electronics without the need for specialized amplifiers simplify the system. Designed to measure vertical vibrations at low frequencies and high temperatures up to +700°F (+371°C), the 4-138 is a seismic mass type velocity transducer. The output signal is produced by the internal coil's relative movement.