Measures shaft displacement without mechanical contact.
Technical Summary
PR6423/003-030 is an Emerson Epro PR6423 eddy-current sensor for non-contact shaft displacement and vibration measurement. The PR6423 family uses an 8 mm tip and a nominal 2 mm linear measurement range when paired with the specified converter and target material.
The suffix is functional. In the manufacturer order code, 003 selects M10×1 thread, no cable armor and a 55 mm sleeve; 030 selects an adapter plug at 1 m, 8 m total cable length and the Lemo converter connection.
Specifications
| Manufacturer | Emerson Epro |
|---|---|
| Exact Model | PR6423/003-030 |
| Sensor Type | Eddy-current displacement sensor |
| Tip Size | 8 mm |
| Nominal Linear Range | 2 mm |
| Initial Gap | 0.5 mm |
| Sensitivity | 8 V/mm (203.2 mV/mil), ±5% from 0 to 45 °C |
| Linearity | ±0.025 mm |
| Minimum Shaft Diameter | 25 mm |
| Reference Target Material | 42CrMo4 / AISI 4140 |
| Thread Code 0 | M10×1 |
| Cable Armor Code 0 | Without armor |
| Sleeve Code 3 | 55 mm sleeve length |
| Adapter Code 0 | Adapter plug at 1 m |
| Total Cable Code 3 | 8 m total cable length |
| Connector Code 0 | Lemo connector for converter |
| Housing Protection | IP66 |
| Construction | PEEK sensor tip, stainless-steel case and PTFE cable |
Features
Provides the documented PR6423 sensitivity and linear range with a compatible converter and target.
Uses a complete coded mechanical and cable configuration that can be checked from the label.
Supports machinery-monitoring applications where sensor gap and electrical matching are controlled as one measurement chain.
Compatibility
- Match the sensor to the converter specified for the installed PR6423 system, including CON021 where used by the existing IndustryParts item.
- Preserve the complete 8 m electrical length and approved adapter arrangement; do not shorten or extend the chain arbitrarily.
- Verify M10×1 mounting, 55 mm sleeve clearance, shaft material and minimum target diameter.
- Set the working gap from the system output and the applicable Emerson installation procedure rather than from mechanical distance alone.
Replacement
- Record static gap voltage, channel scaling, alarm values, converter model and cable routing before removal.
- Inspect the probe tip, thread, connector and target surface for rub damage or deposits.
- Route the unarmored cable away from sharp edges, high-temperature surfaces and electrical-noise sources.
- Install with the required thread retention, then set gap while observing the live converter output.
- Prove zero-speed gap, runout, vibration trend direction and alarm behavior before returning protection functions to service.
FAQ
Can a different PR6423 suffix replace PR6423/003-030?
Only after confirming thread, sleeve, armor, adapter position, total electrical length and connector; a shared PR6423 prefix is not sufficient.
Why must the converter be identified for PR6423/003-030?
Sensitivity and linearity belong to the complete sensor-converter measurement chain, so the converter type and calibration path affect the result.
What evidence is useful when PR6423/003-030 has unstable output?
Provide trend data, gap voltage, cable-route photos, connector condition, target material and converter diagnostics before changing parts.
How should the 8 m cable of PR6423/003-030 be handled?
Keep the documented electrical length, avoid tight bends and heat, protect the adapter joint and do not coil it beside high-current conductors.
What acceptance test best separates probe and mechanical problems?
Check static gap and converter output at standstill, then compare slow-roll runout and operating vibration after controlled startup.
About IndustryParts
https://www.industryparts.com/Probe ordering fields remain intact
IndustryParts handles PR6423/003-030 as a complete sensor identity and checks the matching converter, cable route and mechanical installation.
- Order code preserved
- Converter match reviewed
- Installed gap recorded
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