EPRO PR6426-000-030 Eddy Current Displacement Sensor

Configured for precise non-contact measurement in AMS condition monitoring networks, the Emerson PR6426/000-030 (PR6426 Eddy Current Displacement Sensor) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

Hardware Specifications

4-20 mA HART Loop Protocol & Channel Isolation

The Emerson PR6426/000-030 converts high-frequency electromagnetic field variations into continuous position signals via connected CON-series signal converters. When integrated into transmitter loops, the system utilizes a 4-20 mA HART loop protocol to transmit real-time shaft dynamic vibration, axial displacement, and rotor eccentricity directly to process control backplanes. High channel-to-channel isolation prevents field ground loops across multi-channel monitoring racks, maintaining signal integrity over extended field wiring runs to the DCS I/O cards. Built-in temperature compensation preserves an accurate 2 V/mm scale factor across operating temperatures ranging from -35 deg C to +180 deg C.

Frequently Asked Questions

Q: Can the PR6426/000-030 probe be connected directly to a PLC analog input module?

A: No, the sensor outputting high-frequency signals must connect to a compatible signal converter, such as the CON 021/91 or CON 011/91, which converts the eddy current response into standard voltage or 4-20 mA signals.

Q: What physical installation limits apply to the target shaft diameter?

A: The recommended target shaft diameter is >= 200 mm for optimal performance, though a minimum diameter of 60 mm is required to avoid field distortion and accuracy degradation.

Q: How does the cable length affect system calibration?

A: The probe includes an integral 3 m cable. Because system calibration depends on total circuit inductance and capacitance, extending or altering the cable length without matching converter tuning distorts the 2 V/mm scale factor.

Field Installation Guidelines

1. Mount the sensor flange securely using proper torque specifications onto rigid brackets to eliminate mechanical probe resonance under industrial vibration limits (4-5 g at 60 Hz).
2. Route the integral sensor cable through dedicated grounded metal conduits, keeping field wiring separated from high-voltage AC motor drives to minimize noise coupling.
3. Maintain a single-point connection to the main instrument grounding bar for cable shielding, ensuring no ground loops exist between the probe body and signal processing racks.
4. Confirm that the target shaft material matches the conductive steel calibration standard before finalizing mechanical gap voltage adjustments.