EPRO PR9268-017-100 Velocity Sensors

The EPRO PR9268-017-100, also cataloged as the PR9268 Electrodynamic Velocity Sensor, operates as a dedicated hardware component for absolute casing vibration measurement within turbomachinery monitoring platforms. Utilizing a spring-suspended coil moving inside a permanent magnetic field, the sensor converts mechanical vibration into proportional electrical signals across a 14 to 1000 Hz operating spectrum.

Hardware Specifications

Rotor Dynamics and Signal Transmission

The EPRO PR9268-017-100 electrodynamic velocity pickup features a coil-and-magnet architecture optimized for rotor dynamics tracking and casing vibration assessment on large rotating machinery. Internal coil dampening (-0.6% at 20 deg C) and high cross-talk suppression maintain measurement accuracy across transient acceleration peaks up to 10g continuous. Correct signal attenuation and impedance matching in the monitoring rack ensure precise amplitude linearity within < 2% across the operational bandwidth.

Frequently Asked Questions

Q: Does the PR9268-017-100 sensor require external excitation voltage to output velocity signals?

A: No, the moving-coil electrodynamic assembly is entirely self-generating, outputting a proportional AC voltage signal driven directly by casing vibration.

Q: How does transverse sensitivity affect measurement accuracy on vibrating machinery?

A: The sensor maintains a transverse sensitivity of less than 0.1 at 80 Hz, minimizing cross-axis cross-talk interference caused by perpendicular mechanical movement.

Field Installation Guidelines

1. Ensure the mounting surface on the bearing housing is flat, smooth, and perpendicular to the target axis of vibration measurement.
2. Thread the sensor body tightly onto the mounting stud to establish solid metal-to-metal contact, preventing high-frequency signal damping.
3. Route twisted-pair shielded cable through grounded protective conduit, isolating the line from high-voltage AC electrical lines or drive wiring.
4. Terminate signal conductors at the monitoring monitor module, ensuring the cable shield is grounded at a single point at the rack enclosure.