EPRO PR6423/010-010-CN – Non-Contact Eddy Current Displacement Sensor | PR6423 Series
Engineering Background
The EPRO PR6423 series is a precision non-contact eddy current sensor system engineered by Baker Hughes (formerly GE Bently Nevada / EPRO) for continuous shaft displacement and vibration monitoring in critical rotating machinery. Designed to IEC and API 670 standards, the PR6423 is the industry benchmark for turbomachinery protection systems worldwide.
Product Positioning
The PR6423/010-010-CN paired with the CON021 extension cable is a complete sensing chain solution for radial shaft vibration, axial position, and differential expansion measurement. It is the preferred choice for procurement engineers specifying replacement or expansion components in existing EPRO/Bently Nevada monitoring architectures.
Complete Technical Specifications
| Manufacturer | EPRO (Baker Hughes) |
| Part Number | PR6423/010-010-CN |
| Extension Cable | CON021 |
| Sensor Type | Non-contact eddy current displacement sensor |
| Measurement Range | 0 – 2 mm (linear range) |
| Sensitivity | 8 mV/µm (nominal) |
| Probe Tip Diameter | Ø 25 mm |
| Cable Length (Probe) | 1.0 m integral cable |
| Extension Cable (CON021) | 1.0 m, coaxial, EPRO-standard connector |
| Operating Temperature | –40 °C to +120 °C (probe); –40 °C to +85 °C (cable) |
| Supply Voltage | –24 VDC (nominal, via driver/conditioner) |
| Output Signal | –2 VDC to –18 VDC (proportional to gap) |
| Target Material | Steel / stainless steel (AISI 4140 reference) |
| Ingress Protection | IP67 |
| Approvals | ATEX / IECEx (consult datasheet for zone classification) |
| Weight | ~300 g (probe + integral cable) |
| Compatible Driver | EPRO PR9268, PR6424 series drivers |
| Standard Compliance | API 670, IEC 60079 |
Proven Application Environments
- Steam and gas turbine radial shaft vibration monitoring
- Compressor axial position and differential expansion measurement
- Pump and motor bearing displacement in petrochemical plants
- Power generation OEM machinery protection systems
- Offshore platform rotating equipment under API 670 mandates
- Retrofit and spare-parts replacement in existing EPRO/Bently Nevada installations
Engineering Advantages
- Non-contact measurement — zero mechanical wear, suitable for continuous 24/7 operation
- High linearity — ±1% full-scale over calibrated range on standard steel targets
- Plug-compatible — direct replacement for legacy EPRO PR6423 installations without recalibration of the driver
- Robust construction — stainless steel housing, hermetically sealed tip, rated for harsh industrial environments
- Wide temperature range — qualified for both ambient and high-temperature machine casings
- ATEX/IECEx certified — safe for use in Zone 1/Zone 2 hazardous areas
System Architecture & Signal Flow
The PR6423/010-010-CN operates as part of a three-component sensing chain:
- Probe (PR6423/010-010-CN) — generates an oscillating electromagnetic field; gap change modulates the eddy current loss and alters the output voltage.
- Extension Cable (CON021) — coaxial, impedance-matched cable transmitting the high-frequency carrier signal from probe to driver with minimal attenuation.
- Driver/Conditioner (PR9268 / PR6424) — demodulates the carrier, outputs a DC voltage proportional to gap, and interfaces with the monitoring system (e.g., EPRO MMS6000, Bently Nevada 3500 series).
Note: The probe, extension cable, and driver must be ordered and calibrated as a matched set. Substituting components from different manufacturers may invalidate calibration and void API 670 compliance.
Sourcing & Quality Verification
- Units sourced from authorized distributors and verified OEM supply chains
- Each unit inspected for physical integrity, connector condition, and cable continuity prior to dispatch
- Original manufacturer packaging and documentation preserved where available
- Traceability documentation (batch records, CoC) available upon request for critical plant applications
- Konmask.com specializes in genuine and surplus industrial automation components — no counterfeit stock
Procurement Process
- Confirm compatibility — verify your existing driver model (PR9268 or PR6424 series) and cable length requirements before ordering.
- Request a quote — contact support@konmask.com for volume pricing, lead time, and availability confirmation.
- Place order — standard checkout via Konmask.com or PO-based B2B procurement available.
- Shipping — DHL / FedEx international express; export documentation and commercial invoice provided.
- After-sales support — technical assistance available for installation verification and system integration queries.
Technical FAQ
Q: Can the PR6423/010-010-CN be used with a Bently Nevada 3500 series monitor?
A: Yes, with the appropriate EPRO driver (PR9268/PR6424) as the signal conditioner. Direct connection to a 3500 proximitor input is not supported without the matched driver.
Q: What is the difference between the /010-010 and other PR6423 variants?
A: The suffix denotes probe cable length (1.0 m) and extension cable length (1.0 m). Other variants (e.g., /010-030) indicate different cable lengths. Ensure the total probe + extension cable length matches your driver’s calibration.
Q: Is the CON021 extension cable included?
A: Yes, this listing covers the PR6423/010-010-CN probe with the CON021 extension cable as a matched pair.
Q: Can you supply calibration certificates?
A: Factory calibration data is available for new-in-box units. For surplus stock, functional verification reports can be arranged. Contact us for details.
Q: What is the lead time?
A: In-stock units ship within 1–3 business days. For out-of-stock items, typical lead time is 2–6 weeks depending on sourcing. Contact us for current availability.
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