EPRO PR6424/010-010 Eddy Current Proximity Sensors

The EPRO PR6424/010-010, also cataloged as the PR6424/010-010 Proximity Sensors, operates as a dedicated hardware component for non-contact shaft displacement, vibration, and rotational speed acquisition within TSI and rotating machinery monitoring platforms. Featuring a 16 mm tip diameter and an M18x1.5 threaded stainless steel housing with an integrated armored cable, the unit detects static and dynamic shaft movement across high-temperature turbomachinery environments.

Hardware Specifications

Eddy-Current Probe Scaling & Gap Voltage Validation

The proximity sensor utilizes high-frequency electromagnetic field induction to monitor relative shaft movement without physical contact. Calibration targets a nominal 2.7 mm center air gap to ensure linear voltage output scaling across the measuring range. During setup, engineers verify probe positioning via gap voltage validation, adjusting the mechanical thread depth until reaching target DC voltage levels at the signal converter. This configuration preserves spatial resolution and minimizes cross-talk suppression between adjacent sensor channels on critical rotor dynamics installations.

Frequently Asked Questions

Q: What physical shaft geometry is required to prevent target curvature distortion?

A: Accurate measurement requires a target shaft diameter equal to or greater than 80 mm to maintain proper magnetic field geometry and linear eddy-current scaling.

Q: How does the probe housing handle high thermal exposure near turbine bearings?

A: The stainless steel housing and armored cable assembly maintain structural integrity across continuous operating temperatures ranging from -35 to 180 deg C.

Q: Does the PR6424/010-010 require an external signal conditioner to process output signals?

A: Yes, as a passive eddy-current sensor head, the unit connects directly to a compatible external transmitter or signal converter to generate calibrated analog signals.

Field Installation Guidelines

Mount the probe into a rigid bracket or bearing housing using the M18x1.5 threaded body. Advance the sensor until the physical face approaches the shaft target, then monitor the DC gap voltage using a calibrated multimeter attached to the signal converter output. Adjust the mechanical insertion depth until the reading aligns with the specified -10 VDC or nominal 2.7 mm center air gap target. Secure the mounting locknut to vendor torque specifications to prevent vibration-induced loosening.

Route the integrated armored cable away from high-voltage AC power lines and variable frequency drive output cables to eliminate electromagnetic coupling. Ground the cable shield at a single point on the monitor rack ground terminal, keeping the field end ungrounded to eliminate circulating ground loops. Maintain a minimum bending radius of 30 mm along the armored cable run to avoid internal coaxial damage.