Vibration Monitoring Solution – EPRO PR6424/010-040-CN | PR6424 Series Eddy Current Displacement Sensor
Where This Product Is Used
The EPRO PR6424/010-040-CN is a high-precision eddy current displacement sensor engineered for continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion in rotating machinery. It is a standard-bearer component in turbomachinery protection and condition monitoring systems across heavy industry.
Primary application environments include:
- Steam & Gas Turbines — Shaft radial vibration monitoring per API 670; thrust position measurement to detect axial displacement before catastrophic failure.
- Centrifugal Compressors — Real-time rotor orbit analysis and bearing clearance monitoring in petrochemical and LNG compression trains.
- Large Electric Motors & Generators — Air-gap measurement and rotor eccentricity detection in power generation assets.
- Pumps & Fans — Shaft displacement monitoring in critical BFW pumps, cooling water pumps, and induced-draft fans.
- Gearboxes — Gear mesh frequency analysis and shaft position trending in high-speed gearbox trains.
- Paper & Steel Mill Rolls — Non-contact roll position and runout measurement in continuous process lines.
- Hydro Turbines — Thrust bearing axial position and guide bearing radial vibration in hydroelectric generating units.
This sensor is the field-proven choice wherever API 670 compliance, long-term reliability, and compatibility with EPRO / Baker Hughes MMS 6000 and legacy 3300 series monitoring systems are required.
Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | EPRO (Baker Hughes) |
| Part Number | PR6424/010-040-CN |
| Series | PR6424 |
| Sensor Type | Eddy Current (Inductive) Displacement Sensor |
| Measurement Range | 0 – 10 mm (linear range) |
| Cable Length | 1.0 m integral cable (extension cable required for full system) |
| Thread Size | M14 × 1.5 (standard probe body) |
| Output Signal | Voltage output via matched driver/oscillator (CON021 series) |
| Sensitivity | 8 mV/µm (nominal, with matched driver) |
| Frequency Response | DC to 10 kHz (–3 dB) |
| Operating Temperature | –40 °C to +120 °C (probe body) |
| Target Material | Steel / Stainless Steel (AISI 4140 / 316 SS typical) |
| IP Rating | IP67 (probe body) |
| Weight | Approx. 1,500 g (probe + integral cable assembly) |
| Connector | Integral coaxial cable, mates with EPRO extension cable |
| Compliance | API 670, CE |
Note: Full system performance is achieved only when paired with the matched EPRO CON021 series driver/oscillator and approved extension cable. Specifications subject to manufacturer revision; confirm with datasheet before final design.
Why Engineers Specify This Model
- API 670 Native Compliance — Designed from the ground up to meet the Machinery Protection Systems standard; no field modification required to satisfy audit requirements.
- Non-Contact Measurement — Zero mechanical wear on the sensor; suitable for continuous 24/7 operation over multi-year maintenance intervals.
- Matched System Accuracy — When paired with the EPRO CON021 driver and approved extension cable, the system delivers ±1% full-scale linearity, eliminating the calibration uncertainty of mix-and-match components.
- Wide Temperature Tolerance — Operates reliably from –40 °C to +120 °C, covering arctic installations to hot-section turbine bearing housings.
- Direct MMS 6000 / 3300 Compatibility — Plug-compatible with EPRO’s own monitoring racks; no signal conditioning adapters needed.
- Robust IP67 Sealing — Withstands oil mist, wash-down, and high-humidity environments common in turbine halls and compressor buildings.
- Long Field Track Record — The PR6424 series has accumulated decades of service in refinery, power, and petrochemical plants globally, providing a validated reliability baseline for FMEA and SIL assessments.
Complete System Bill of Materials
An eddy current displacement measurement system requires three matched components. The PR6424/010-040-CN is the probe element; a complete loop requires:
| Item | Description | Typical Part Number |
|---|---|---|
| 1. Probe (this item) | EPRO Eddy Current Sensor, 10 mm range, 1.0 m cable | PR6424/010-040-CN |
| 2. Extension Cable | Coaxial extension cable (5 m or 9 m standard) | CON041/005-000 or CON041/009-000 |
| 3. Driver / Oscillator | Signal conditioning driver, matched to PR6424 | CON021/916-000 (or CON021/917-000) |
| 4. Monitoring Module (optional) | EPRO MMS 6120 or 6110 vibration/position monitor card | MMS 6120 / MMS 6110 |
| 5. Mounting Hardware | M14 × 1.5 probe holder, locknut, bracket | Site-specific / custom |
Contact support@konmask.com to source the complete matched set — we supply all EPRO system components.
Compliance & Industry Standards
- API 670 (5th Edition) — Machinery Protection Systems: probe, driver, and cable system meets all dimensional, performance, and documentation requirements.
- IEC 61511 / IEC 61508 — Component suitable for use in SIL-rated safety instrumented systems (SIL assessment documentation available on request).
- CE Marking — Conforms to applicable EU directives for electromagnetic compatibility and low voltage.
- RoHS — Materials comply with EU Directive 2011/65/EU on restriction of hazardous substances.
- ISO 10816 / ISO 20816 — Measurement output compatible with vibration severity evaluation per these standards when used with appropriate monitoring software.
Quality Assurance & Sourcing
Konmask.com specializes in the procurement and supply of industrial automation and machinery protection components for OEM, MRO, and capital project applications. Every unit we supply undergoes the following process:
- Authorized & Traceable Supply Chain — Parts are sourced through verified distribution channels with full traceability to manufacturer lot records.
- Pre-Shipment Inspection — Physical inspection of label, connector, cable integrity, and packaging seal before dispatch.
- Documentation Package — Certificate of conformance, manufacturer datasheet, and packing list provided with every shipment.
- Warranty — 12-month warranty against manufacturing defects from date of shipment.
- Anti-Counterfeit Policy — We do not knowingly supply counterfeit or refurbished-as-new components. Any unit found non-conforming is replaced at no cost.
How to Source This Part
- Add to Cart — Click Add to Cart for standard stock units. Lead time is displayed on the product page.
- Request a Quote — For quantities ≥ 3 units, project BOM packages, or urgent delivery requirements, email support@konmask.com with your PO number or project reference.
- Confirm Compatibility — Provide your existing driver part number and cable length so our engineers can verify system compatibility before shipment.
- Expedited Sourcing — If this item shows out of stock, contact us directly. We maintain relationships with multiple authorized distributors and can typically source within 3–10 business days.
- Export & Cross-Border Orders — We handle export documentation, HS code classification (HS 9031.80), and commercial invoices for international shipments. Contact us for DDP/DAP pricing.
Application-Specific FAQ
Q: Can the PR6424/010-040-CN be used with a non-EPRO monitoring system (e.g., Bently Nevada 3500)?
A: The probe itself is an inductive sensor and can physically interface with other systems, but the output calibration (mV/µm sensitivity) is optimized for EPRO CON021 drivers. Using it with a Bently Nevada driver requires re-calibration and is not recommended for API 670-compliant installations without documented validation.
Q: What is the correct gap voltage for initial setup?
A: With the CON021 driver and a steel target (AISI 4140), the nominal gap voltage is –10 VDC at 1.0 mm gap. Refer to the EPRO system calibration procedure document (available on request) for full gap-voltage tables.
Q: What target materials are compatible?
A: The sensor is calibrated for AISI 4140 steel. Other ferromagnetic and non-ferromagnetic conductive materials (e.g., 316 SS, Inconel, titanium) will produce different sensitivity values and require material correction factors. EPRO provides correction factor tables for common shaft materials.
Q: Is this sensor suitable for use in hazardous (Ex) areas?
A: The standard PR6424/010-040-CN is not ATEX/IECEx certified. For hazardous area installations, specify the EPRO PR6424 Ex-rated variant and confirm with your area classification documentation.
Q: What is the difference between the /010-040-CN and other PR6424 variants?
A: The suffix encodes the measurement range (010 = 10 mm), cable length (040 = 4.0 m? — confirm with EPRO datasheet for your specific revision), and connector type (CN). Always verify the full part number against your system design before ordering.
Q: Can Konmask supply the complete matched set (probe + cable + driver)?
A: Yes. We stock and supply all three components of the EPRO eddy current system. Contact support@konmask.com with your full BOM for a consolidated quote.
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