Overview
The Emerson Epro PR6423/013-110, also identified by the base model PR6423, is an 8 mm eddy-current proximity sensor for non-contact shaft displacement measurement. It converts changes in the electromagnetic field into a displacement signal for use with compatible signal converters and machinery monitoring systems. The sensor measures radial vibration, axial position, shaft displacement, and eccentricity.
Hardware Specifications
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PR6423/013-110 |
| Base Model | PR6423 |
| Brand | Emerson Epro |
| Product Type | 8 mm Eddy Current Proximity Sensor |
| Sensor Tip Diameter | 8 mm |
| Linear Measurement Range | 2.0 mm (80 mils) |
| Initial Air Gap | 0.5 mm (20 mils) |
| Incremental Scale Factor | 8 V/mm (203.2 mV/mil), +/- 5% at 0 to 45 deg C |
| Frequency Response | 0 to 20 kHz (-3 dB) |
| Target Material | 42CrMo4 / AISI/SAE 4140 steel |
| Minimum Shaft Diameter | 25 mm |
| Operating Temp, Sensor and 1 m Cable | -35 to +180 deg C |
| Operating Temp, Cable and Connector | -35 to +150 deg C |
| Ingress Protection | IP66, IEC 60529 |
| Housing Material | Stainless steel |
| Tip Material | PEEK |
| Compatible Signal Converters | CON021, CON031, CON041 series |
Eddy-Current Measurement and Signal Conditioning
The PR6423/013-110 operates through electromagnetic induction. Its sensing coil generates an alternating electromagnetic field, which induces eddy currents in the conductive shaft target. As the shaft moves, the sensor detects changes in the electromagnetic coupling and produces a displacement-related electrical signal.
The specified 8 V/mm scale factor defines the incremental output sensitivity under the stated calibration conditions. Therefore, the connected signal converter must match the sensor’s electrical characteristics and calibration requirements.
For machinery monitoring, the measurement chain typically includes the probe, extension cable where applicable, signal converter, and monitoring equipment. Verify the complete system configuration before commissioning.
Frequently Asked Questions (FAQ)
Q: Which signal converters are compatible with the PR6423/013-110?
A: The supplied data identifies the CON021, CON031, and CON041 series. Verify the converter configuration and calibration requirements before installation.
Q: What target material does this sensor require?
A: The specified target material is 42CrMo4 / AISI/SAE 4140 ferromagnetic steel. Target material and geometry affect the measurement response.
Q: Can the sensor operate at elevated temperatures?
A: The sensor and 1 m cable have a specified operating temperature range of -35 to +180 deg C. However, the cable and connector are rated from -35 to +150 deg C. Therefore, observe the lower applicable temperature limit for the complete assembly.
Field Installation Guidelines
- Verify mechanical compatibility: Confirm the probe mounting arrangement, available clearance, shaft diameter, and target material before installation.
- Set the initial air gap: Adjust the probe-to-target clearance according to the applicable system calibration procedure.
- Inspect cable routing: Avoid sharp bends, excessive mechanical tension, and contact with hot or moving machinery.
- Check electrical connections: Confirm connector compatibility and inspect cable terminations before energizing the measurement system.
- Verify signal conditioning: Match the probe, cable, and signal converter configuration. Confirm the measurement output before connecting it to the machinery monitoring system.
- Check grounding and shielding: Follow the equipment manufacturer’s grounding and shield termination instructions to reduce electrical interference.
- Validate measurements: Compare the installed probe response with the applicable calibration documentation and confirm stable readings during commissioning.
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