EPRO PR6423/10R-010-CN – Non-Contact Eddy Current Proximity Probe | CON021 Series Platform
Engineering Background
The EPRO PR6423 series represents the industry benchmark for non-contact eddy current sensing in rotating machinery protection and condition monitoring. Developed to meet the stringent demands of turbomachinery OEMs and end-users worldwide, the PR6423/10R-010-CN is a 10 mm diameter probe with a 10 mm cable length extension and CN-type connector, designed for seamless integration with EPRO CON021 series signal conditioning electronics. This probe is fully interchangeable within the EPRO/Emerson ecosystem and complies with API 670 5th Edition requirements for shaft vibration and position measurement.
Product Positioning
Targeted at procurement engineers and reliability teams responsible for gas turbines, steam turbines, compressors, pumps, and large rotating equipment, the PR6423/10R-010-CN delivers micron-level resolution for radial vibration, axial position (thrust), differential expansion, and eccentricity measurements. It is the preferred replacement and spare part for legacy EPRO and Bently Nevada 3300 XL compatible installations.
Complete Technical Specifications
| Part Number | PR6423/10R-010-CN |
| Conditioner Compatibility | CON021 Series (EPRO) |
| Sensing Technology | Eddy Current (Non-Contact) |
| Probe Diameter | 10 mm |
| Cable Length | 10 m (standard extension) |
| Connector Type | CN (Coaxial, EPRO standard) |
| Measurement Range | 0.25 – 2.25 mm (linear range) |
| Sensitivity | 8 mV/µm (nominal, with CON021) |
| Frequency Response | DC to 10 kHz (–3 dB) |
| Supply Voltage | –24 VDC (via conditioner) |
| Output Signal | –2 to –18 VDC (proportional to gap) |
| Target Material | Steel / Stainless Steel (AISI 4140 reference) |
| Operating Temperature | –35°C to +120°C (probe tip) |
| IP Rating | IP67 (probe body) |
| Weight | 268 g (probe + cable assembly) |
| Compliance | API 670 5th Ed., CE, ATEX (consult datasheet) |
Proven Application Environments
- Gas Turbines – Radial shaft vibration monitoring on compressor and power turbine stages
- Steam Turbines – Axial thrust position and differential expansion measurement
- Centrifugal Compressors – High-speed rotor orbit analysis and balance resonance detection
- Pumps & Fans – Eccentricity and runout monitoring for predictive maintenance programs
- Gearboxes – Gear mesh frequency analysis and bearing journal monitoring
- Test Rigs & OEM Assembly Lines – Precision gap calibration and acceptance testing
Engineering Advantages
- API 670 Compliant – Drop-in replacement for existing protection system installations without recalibration when paired with CON021
- Thermally Stable Design – Ceramic-filled probe tip minimizes thermal drift across wide temperature excursions in hot-section applications
- High EMI Immunity – Coaxial cable construction and shielded connector reject electrical noise from VFDs, switchgear, and high-current bus bars
- Long-Life Construction – Stainless steel housing with epoxy-sealed tip rated for continuous immersion in oil mist and process gas environments
- Wide Bandwidth – DC to 10 kHz response captures sub-synchronous instabilities, blade-pass frequencies, and high-order harmonics
- Plug-and-Play with CON021 – Factory-matched sensitivity eliminates field calibration; system is ready for loop check immediately after installation
System Architecture & Signal Flow
The PR6423/10R-010-CN operates as the sensing element in a three-component measurement chain:
- Probe (PR6423/10R-010-CN) – Generates a high-frequency oscillating electromagnetic field at the probe tip. Eddy currents induced in the conductive target shaft attenuate the field proportionally to the air gap distance.
- Extension Cable – The 10 m coaxial cable (included in assembly) transmits the demodulated signal from the probe to the conditioner with minimal signal loss. Total cable length (probe + extension) must match the conditioner’s calibrated range.
- Signal Conditioner (CON021) – Demodulates the oscillator signal, applies temperature compensation, and outputs a DC voltage proportional to gap (–2 to –18 VDC). The conditioner interfaces directly with EPRO TMC, Bently Nevada 3500, or any 4–20 mA / voltage-input protection system.
Note: Total system cable length (probe body + extension cable) must equal the conditioner’s calibrated length. Mixing cable lengths from different assemblies will introduce sensitivity errors. Always verify the complete part number set before installation.
Sourcing & Quality Verification
- Origin: Sourced from authorized EPRO distribution channels and verified OEM surplus inventory
- Inspection: Each unit undergoes incoming inspection including visual check, connector integrity test, and DC resistance verification before dispatch
- Documentation: Certificate of Conformance (CoC) and original manufacturer datasheet available upon request
- Traceability: Batch and serial number records maintained for 5 years in compliance with ISO 9001 quality management requirements
- Packaging: Anti-static foam-lined box with desiccant; probe tip protected by plastic cap during transit
Procurement Process
- Confirm Part Number – Verify PR6423/10R-010-CN matches your conditioner model (CON021) and existing cable assembly length. Cross-reference with your P&ID or machinery protection system BOM.
- Request Quote – Contact [email protected] for volume pricing, lead time confirmation, and availability of CoC documentation.
- Place Order – Add to cart and complete checkout, or submit a Purchase Order via email for net-terms arrangements.
- Shipping – Standard dispatch within 1–3 business days. Express and freight options available for shutdown-critical requirements. Export documentation (commercial invoice, packing list, HS code 9026.80) provided for international shipments.
- Incoming Inspection – Upon receipt, verify part number label, connector type, and cable length against your order. Contact us within 48 hours if any discrepancy is found.
Technical FAQ
Q: Is the PR6423/10R-010-CN compatible with Bently Nevada 3300 XL conditioners?
A: The PR6423 series uses EPRO’s CN connector and calibration standard. While the physical sensing principle is identical, sensitivity and calibration curves differ from Bently Nevada 3300 XL. Cross-system use requires recalibration. We recommend pairing with the CON021 conditioner for guaranteed performance.
Q: Can this probe be used on non-ferrous targets (aluminum, titanium)?
A: Yes, but sensitivity will deviate from the nominal 8 mV/µm specification. A target-material correction factor must be applied. Contact our engineering team for material-specific calibration data.
Q: What is the maximum shaft speed this probe can monitor?
A: The 10 kHz bandwidth supports shaft speeds up to approximately 600,000 RPM for 1× vibration detection. For blade-pass or gear-mesh applications, consult the frequency content of your specific machine.
Q: Is ATEX certification available for this part number?
A: ATEX-certified variants exist within the PR6423 family. Please confirm your hazardous area classification (Zone 1/2, gas group, temperature class) when requesting a quote so we can supply the correct certified assembly.
Q: What is the lead time for this item?
A: In-stock units ship within 1–3 business days. For large quantities or certified variants, lead time is typically 2–4 weeks. Contact us for current stock status.
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