Emerson EPRO PR6423/012-140 Eddy Current Sensor
An exact-suffix PR6423 sensor for non-contact displacement and vibration measurement.
Product Profile
PR6423/012-140 is a configuration of the Emerson EPRO PR6423 eddy current sensor family. The PR6423 uses an 8 mm sensing tip and is designed for non-contact position and vibration measurement on medium-size shafts.
The full PR6423/012-140 ordering code remains essential even though family specifications are shared. A replacement must also preserve the mechanical thread, cable termination, matched converter and installed measurement-chain calibration.
Technical Data
| Manufacturer | Emerson / EPRO |
|---|---|
| Exact Model | PR6423/012-140 |
| Sensor Family | PR6423 eddy current sensor |
| Sensor Tip Diameter | 8.0 mm |
| Recommended Shaft Class | Medium shafts, typically 25 mm diameter or greater |
| Position Range | ±1.0 mm |
| Vibration Range | 0 to 500 µm peak-to-peak |
| Frequency Range | 0 to 20 kHz |
| Nominal Sensitivity | 8 V/mm (203.2 mV/mil) |
| Sensitivity Tolerance | ±1.0% |
| Body-Thread Family | M10 × 1 or 3/8-24 UNF-2A, depending on exact configuration |
| Sensor Temperature Range | -35 to +180 °C |
| Sensor-Head Pressure | Up to 10,000 hPa |
| Mechanical Vibration Limit | 5 g at 60 Hz |
| System Pairing | Matched PR642x cable and converter measurement chain |
| Additional Family Use | PR6423 may also be applied as a tachometer sensor in an engineered installation |
System Role
Eight-millimetre sensing tip suited to the PR6423 medium-shaft geometry.
Nominal 8 V/mm sensitivity for the matched measurement chain.
High-temperature sensor-head capability within the PR6423 family limit.
Exact /012-140 suffix retained for mechanical and cable verification.
Compatibility
- Capture the PR6423/012-140 label, thread form, mounting length, connector and converter before ordering.
- Record target material, gap voltage, shaft runout, scale and protection setpoints.
- Keep the cable clear of sharp bends, abrasion and hot surfaces beyond its approved routing.
- After installation, validate the mechanical gap, DC value, dynamic signal, alarm path and any speed-reference function used by the application.
Applications
- Radial shaft vibration and position measurement on pumps, compressors and turbines.
- Axial displacement or speed-reference measurement where the engineered target supports it.
- Legacy PR6423 channels using a matched CON0x1 or AMS measurement chain.
FAQ
Which dimensions must be checked before buying PR6423/012-140?
Verify the exact thread, threaded and unthreaded lengths, cable termination, mounting clearance and complete suffix from the nameplate.
Why is PR6423/012-140 not interchangeable with PR6424/012-140 by suffix alone?
PR6423 and PR6424 have different tip size, sensitivity, range and shaft geometry; the family number is a primary compatibility boundary.
What converter information should accompany PR6423/012-140?
Provide the converter model, channel label, calibration or scale data and photographs of the connector and cable route.
Can PR6423/012-140 be used as a speed sensor automatically?
Only when the target geometry, signal chain and controller input are engineered for the PR6423 tachometer application.
What should be included in the PR6423/012-140 commissioning record?
Record installed gap, runout, scale, dynamic response, alarm or speed-channel result and comparison with the approved baseline.
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