EPRO PR6423/106-110 Current Sensor

Configured for radial and axial shaft dynamic displacement, position, eccentricity, and speed monitoring in rotating machinery platforms, the Emerson PR6423/106-110 (PR6423 Eddy Current Sensor) provides direct physical/electrical execution.

Hardware Specifications

4-20 mA HART Loop Protocol and Signal Conditioning Integration

The PR6423/106-110 proximity sensor projects a high-frequency electromagnetic field from its tip to track minute physical gap shifts against conductive targets. When integrated with matching signal conditioners (such as the CON041 unit), changes in field loading are converted into standardized proportional voltage signals or 4-20 mA HART loop protocol current outputs for downstream DCS integration. High channel-to-channel isolation within processing racks prevents ground loop cross-talk across multi-channel radial dynamic displacement and axial positioning channels on high-speed shaft journals.

Frequently Asked Questions

Q: How does target shaft material composition affect the sensor scale factor?

A: The sensor is calibrated for standard 42CrMo4 (AISI/SAE 4140) ferromagnetic steel to achieve an Incremental Scale Factor of 8 V/mm (203.2 mV/mil). Utilizing alternative target alloys shifts magnetic permeability and requires recalibration or re-scaling at the transmitter module.

Q: What environmental protection limits apply to the sensor head and cable assembly?

A: The sensor head assembly provides IP66 ingress protection according to IEC 60529. The sensor body with its integrated 1 m cable operates between -35 and 200 deg C, whereas the extension cable and connector section are rated for -35 to 150 deg C.

Field Installation Guidelines

• Target Track Surface Verification: Ensure the target area on shafts with diameters of at least 25 mm is ground smooth, demagnetized, and free of scratches, burrs, or keyways to avoid parasitic electrical runoff spikes.
• Mechanical Mounting & Gap Setpoint: Thread the sensor into its rigid mounting fixture. Mechanically set the physical clearance to the linear midpoint before torquing locknuts to ensure unclipped dynamic measurement range.
• Conduit Routing and Shield Grounding: Route interconnecting cables through dedicated grounded conduit separate from high-voltage motor supply wiring. Connect cable shields strictly at a single point inside the monitoring enclosure to eliminate ground loops.