EPRO PR6426/010-010 32mm Eddy Current Sensor

The Emerson PR6426/010-010, also cataloged as the PR6426 32mm Eddy Current Sensor, operates as a dedicated hardware component for highly accurate non-contact measurement of displacement, position, and vibration within critical turbomachinery applications.

Suffix Breakdown & Model Matrix

Hardware Specifications

4-20 mA HART Loop Protocol and DCS Connectivity

The Emerson PR6426/010-010 utilizes high-frequency electromagnetic field modulation to measure relative distance variations between its 32 mm sensor tip and ferromagnetic target shafts. When paired with an external CON-series signal converter or transmitter module, raw impedance shifts are converted into standardized signals that support 4-20 mA HART loop protocol outputs for direct integration into Emerson DeltaV and Ovation DCS platforms. Channel-to-channel isolation across the signal conditioning rack eliminates field ground potential differences and prevents signal cross-talk between adjacent sensor runs, maintaining measurement fidelity across complex monitoring loops.

Frequently Asked Questions

Q: How is the static baseline gap voltage adjusted during physical installation?

A: Advance the probe body relative to the target shaft while monitoring the live DC voltage output at the signal converter. Adjust physical spacing until the baseline DC voltage corresponds to the center of the 4.0 mm linear measurement envelope, then secure the mounting hardware.

Q: Can the integral sensor cable on the PR6426/010-010 be modified or field-spliced?

A: No. Altering the integral cable length changes the total circuit capacitance and inductance, invalidating factory calibration and altering the 2 V/mm sensitivity scale.

Field Installation Guidelines

1. Inspect the 32 mm sensing tip and threaded casing for physical defects, contamination, or thread burrs prior to installation.
2. Verify that the target shaft material matches the ferromagnetic steel calibration standard and that the surface speed does not exceed 2500 m/s.
3. Ensure adequate radial clearance around the 32 mm tip to prevent false electrical loading from adjacent metallic structures.
4. Thread the probe into position while measuring the live DC gap voltage at the converter terminals until the baseline setting is achieved.
5. Secure the mounting lock nut to the specified torque limit without rotating the sensor casing.
6. Route all interconnecting cable through grounded metal conduit away from high-voltage AC cabling and drive lines.
7. Terminate all field wiring inside IP-rated junction enclosures, grounding the cable shield drain wire exclusively at the main system rack cabinet end.