Epro PR6424/01 Series 16 mm Eddy Current Displacement Sensors

Overview

The Epro PR6424/01… series, also cataloged under the PR6424 product family, comprises 16 mm non-contact eddy current displacement sensors. Each probe detects shaft displacement through electromagnetic induction and converts mechanical movement into an electrical measurement signal for turbomachinery monitoring systems. The complete suffix determines the specific mechanical and cable configuration.

Hardware Specifications

Eddy Current Measurement and Rotor Dynamics

The PR6424 series uses electromagnetic coupling between the probe coil and a conductive shaft surface. Consequently, the probe measures changes in the electrical impedance caused by variations in the probe-to-target distance.

The resulting measurement supports:

• Radial shaft displacement and vibration monitoring.
• Axial shaft position measurement.
• Rotor eccentricity monitoring.
• Shaft movement and dynamic displacement analysis.
• Rotational speed measurement when used with a suitable monitoring arrangement.

The 16 mm probe tip provides a larger sensing geometry than an 8 mm probe. However, the actual measurement range and sensitivity depend on the complete probe, extension cable, signal converter, target material, and calibration arrangement.

Frequently Asked Questions

Q: Can the PR6424/01 series measure both static and dynamic shaft displacement?

A: Yes. The supplied specifications identify a static measurement range of +/- 2.0 mm and a dynamic measurement range of 0 to 1,000 um. The complete measurement system determines the usable operating range.

Q: Are all PR6424/01 probes compatible with the same mounting thread?

A: No. The supplied information identifies M18 x 1.5 and 3/4-16 UNF configurations. Confirm the complete suffix and mechanical drawing before selecting a replacement probe.

Q: Does the probe operate independently without a signal converter?

A: The PR6424 is an eddy current sensing component. Verify the required signal converter, extension cable, electrical connections, and calibration compatibility before integrating it into a monitoring channel.

Field Installation Guidelines

1. Verify the complete PR6424/01 suffix against the equipment documentation before installation.
2. Confirm the mounting thread, probe dimensions, cable length, and armor configuration.
3. Inspect the probe tip and cable jacket for mechanical damage before installation.
4. Install the probe perpendicular to the target surface for radial displacement measurement, unless the application specifies another orientation.
5. Maintain the specified nominal air gap using the applicable calibration procedure.
6. Confirm that the target shaft material matches the sensor calibration requirements.
7. Route probe cables separately from high-current power conductors and sources of electromagnetic interference.
8. Apply the shielding and grounding arrangement specified by the associated monitoring system manufacturer.
9. Verify signal polarity, converter compatibility, and channel scaling before commissioning.
10. Confirm the applicable hazardous-area approvals and installation requirements where the equipment operates in classified locations.

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