EPRO PR6423/107-110 Eddy Current Proximity Sensors

Configured for contactless shaft displacement and vibration measurement in turbomachinery protection systems, the EPRO PR6423/107-110 (PR6423 Eddy Current Sensor) provides direct physical/electrical execution.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics Integrity

The PR6423/107-110 non-contact sensor operates by forming an oscillatory circuit with its matching CON signal converter, converting target clearance shifts into precise electromagnetic attenuation. Designed for pre-calibrated operation, the eddy-current probe scaling translates proximity changes into linear voltage outputs without requiring field electronic tuning. Precise gap voltage validation during physical positioning (targeting standard negative DC bias output at mid-scale) establishes the dynamic headroom required to monitor complex rotor dynamics and peak shaft displacement excursions. Symmetrical coil shielding delivers high cross-talk suppression in multi-channel or orthogonal X-Y bearing monitoring configurations.

Frequently Asked Questions

Q: Are field electronic calibration procedures required when pairing the PR6423/107-110 with a CON converter?

A: No. The sensor and CON signal converter pair are factory pre-calibrated. Field installation requires only physical gap distance adjustment to establish the target static output bias voltage at the converter output terminals.

Q: How does target metal proximity affect the internal circuit oscillation?

A: As a conductive metal object approaches the sensor tip, eddy currents induced on the target surface decrease the oscillation amplitude. The degree of circuit attenuation directly corresponds to the gap distance between the sensor tip and target surface.

Field Installation Guidelines

• Target Surface Clearance & Runout: Ensure the target shaft surface is ground smooth, demagnetized, and free of tool marks or scratches to prevent parasitic electrical runoff spikes on the dynamic signal channel.
• Mechanical Probe Positioning: Thread the probe into its rigid mounting gland or bracket. Adjust physical clearance relative to the shaft target until the output voltage from the CON converter reaches the designated static gap voltage target, then secure with locknuts.
• Cable Routing and Shielding: Route extension cables inside grounded metallic conduit separate from motor power lines. Terminate cable shields at a single panel earth point to eliminate parasitic ground loop interference.