Measures shaft movement without mechanical contact or added shaft loading.
Technical Summary
PR6424/000-031 is an Emerson 16 mm eddy-current sensor for non-contact measurement on critical turbomachinery. The PR6424 family is used for radial and axial shaft displacement, shaft position, eccentricity, speed and key-reference duties when installed with the specified signal converter.
The complete /000-031 suffix defines the supplied mechanics and cable. It selects an M18×1.5 sleeve, no cable armor, a 40 mm case dimension, an adapter plug, 8 m total cable length and an open cable end.
Specifications
| Manufacturer | Emerson |
|---|---|
| Exact Model | PR6424/000-031 |
| Product Type | 16 mm eddy current sensor |
| Measurement Uses | Radial and axial displacement, position, eccentricity, speed and key reference |
| Sensitivity | 4 V/mm (101.6 mV/mil) |
| Sensitivity / Linearity Tolerance | ≤ ±1.5% |
| Approximate Center Gap | 2.7 mm |
| Static Measurement Range | ±2.0 mm |
| Dynamic Measurement Range | 0 to 1000 µm |
| Long-Term Drift | < 0.3% |
| Reference Target | Ferromagnetic steel 42CrMo4 |
| Minimum Shaft Diameter | 80 mm |
| Maximum Surface Speed | 2500 m/s |
| Operating Temperature | -35 to 150 °C |
| Sensor Head Pressure Resistance | 10,000 hPa |
| Sleeve Thread Code 0 | M18×1.5 |
| Cable Armor Code 0 | Without armor |
| Sensor Length Code 0 | 40 mm case dimension; 52.5 mm overall C dimension |
| Adapter Code 0 | With adapter plug |
| Cable Length Code 3 | 8 m total cable length |
| Cable End Code 1 | Open end |
| Construction | Stainless-steel sleeve and PTFE cable |
Features
Uses the documented 4 V/mm system sensitivity with a compatible Emerson converter and correct target material.
Carries a fully decoded mechanical and cable execution that can be checked against the installed probe.
Supports API 670-oriented machinery protection installations when the complete measurement chain is engineered accordingly.
Compatibility
- Use the signal converter specified for the installed PR6424 measurement system; probe sensitivity is not a stand-alone channel specification.
- Confirm the M18×1.5 mounting thread, available 52.5 mm overall insertion envelope and 80 mm minimum shaft diameter.
- Preserve the 8 m total electrical length and the documented adapter position; do not shorten or extend the chain without an approved system design.
- Terminate the open cable end according to the converter and cabinet drawing, with shielding and routing kept consistent with the original installation.
Replacement
- Capture the existing gap voltage, channel scale, alarms, converter model and cable route before removal.
- Inspect the shaft target, probe tip, thread and adapter joint for rub marks, deposits or mechanical damage.
- Install the unarmored cable away from heat, sharp edges and high-current conductors, then secure the adapter joint.
- Set the probe gap from live system output using the Emerson procedure rather than mechanical distance alone.
- Verify standstill gap, slow-roll runout, trend polarity and protection-channel behavior before service release.
FAQ
Can a nearby PR6424 suffix replace PR6424/000-031?
Only after thread, case length, armor, adapter, total cable length and cable end are all confirmed; the PR6424 family name alone does not establish interchangeability.
Why must the converter be identified when ordering PR6424/000-031?
The published sensitivity, linearity and range belong to the complete sensor-converter system, so the converter and electrical length must remain matched.
What evidence helps diagnose unstable output from PR6424/000-031?
Provide gap voltage, trend data, converter diagnostics, cable-route photos, connector or termination condition and the target-surface condition.
What handling issue most often threatens the unarmored cable on PR6424/000-031?
Tight bends, unsupported adapter joints, hot surfaces and parallel routing beside power conductors can create damage or noise even when the probe head is sound.
How should a replacement PR6424/000-031 be accepted?
Compare the standstill gap and slow-roll signature with the previous healthy baseline, then confirm correct polarity, scale and alarm action during controlled startup.
About IndustryParts
https://www.industryparts.com/Complete probe codes stay connected to the measurement chain
IndustryParts records PR6424/000-031 together with its converter, mounting, cable length and machine position before shipment.
- Full suffix retained
- Converter match reviewed
- Installed gap documented
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