EPRO PR9268/201-000 – Eddy Current Vibration Transducer | Bently Nevada Compatible Series
Engineering Background: The PR9268 series is EPRO’s precision eddy current proximity transducer system, engineered for continuous shaft vibration, axial position, and differential expansion monitoring in critical rotating machinery. Designed to operate within the Bently Nevada 3300/3500 series monitor ecosystem as well as EPRO’s own CON series signal conditioners, this transducer delivers sub-micron resolution and exceptional linearity across demanding industrial environments.
Product Positioning: The PR9268/201-000 is the standard 5-metre cable variant optimized for turbines, compressors, pumps, and gearboxes where API 670 compliance is mandatory. It is the preferred choice for procurement engineers specifying OEM-equivalent replacement sensors in power generation, petrochemical, and LNG facilities.
Complete Technical Specifications
- Manufacturer: EPRO (Baker Hughes / Bently Nevada Compatible)
- Part Number: PR9268/201-000
- SKU: PR9268/201-000
- Sensor Type: Eddy Current Proximity Transducer
- Measurement: Shaft radial vibration, axial position, differential expansion
- Sensing Range: 0–2 mm (standard linear range)
- Sensitivity: 8 mV/µm (nominal)
- Frequency Response: DC to 10,000 Hz (–3 dB)
- Operating Temperature: –40°C to +120°C (sensor tip)
- Cable Length: 5 metres (standard)
- Connector: MIL-C-5015 compatible
- Target Material: Steel, stainless steel, Inconel (ferromagnetic and non-ferromagnetic)
- Supply Voltage: –24 VDC (via signal conditioner)
- Output Signal: –2 VDC to –18 VDC (linear range)
- Protection Rating: IP67
- Weight: 940 g (with cable)
- Compliance: API 670, CE
- Compatible Conditioners: EPRO CON021, CON041; Bently Nevada 3300 XL, 3500/42M
Proven Application Environments
- Steam and gas turbine shaft monitoring (power generation)
- Centrifugal and axial compressor vibration surveillance (petrochemical, LNG)
- Pump and motor bearing proximity measurement
- Gearbox differential expansion monitoring
- API 670-compliant machinery protection systems
- OEM replacement in Bently Nevada 3300/3500 monitor racks
Engineering Advantages
- Sub-micron resolution — detects shaft displacement changes as small as 1 µm for early fault identification
- Non-contact measurement — zero mechanical wear, suitable for continuous 24/7 operation
- Wide frequency bandwidth — DC to 10 kHz captures both slow-roll runout and high-frequency blade-pass events
- Robust IP67 sealing — withstands oil mist, steam, and washdown environments
- Drop-in compatibility — direct replacement for Bently Nevada 3300/8 mm series without recalibration of existing monitors
- Extended temperature range — qualified for hot-section installations up to 120°C at the sensor tip
System Architecture & Signal Flow
The PR9268/201-000 operates as the sensing element in a three-component eddy current system:
- Transducer (PR9268/201-000) — generates a high-frequency electromagnetic field at the probe tip; target proximity modulates the field impedance.
- Extension Cable — matched impedance cable (included, 5 m) transmits the modulated signal to the driver/conditioner with minimal loss.
- Signal Conditioner (CON021 / CON041 / Bently 3500 rack) — demodulates the carrier signal and outputs a DC voltage proportional to gap distance, feeding the machinery protection monitor.
The linear output range of –2 V to –18 V maps directly to the 0–2 mm gap range, enabling direct integration with standard 4–20 mA transmitters or DCS analog input cards via the conditioner’s buffered output.
Sourcing & Quality Verification
- Origin: OEM-grade, sourced from authorized EPRO distribution channels
- Condition: New-in-box or factory-refurbished (clearly stated per order)
- Traceability: Serial number and date code available upon request
- Inspection: Each unit undergoes dimensional, electrical continuity, and sensitivity verification prior to dispatch
- Documentation: Certificate of conformance, calibration data sheet, and packing list included
- Packaging: Anti-static foam insert, moisture-barrier bag, outer carton — compliant with IEC 60068-2 transport standards
Procurement Process
- Inquiry — Submit your BOM or part number via the product page or email [email protected]
- Quotation — Receive a formal quotation with lead time, unit price, and MOQ within 24 business hours
- Order Confirmation — Purchase order accepted via Shopify checkout, bank transfer (T/T), or PayPal
- Quality Inspection — Pre-shipment inspection report issued; photos available on request
- Shipping — DHL / FedEx / UPS express or sea freight; tracking number provided within 48 hours of dispatch
- After-Sales — 12-month warranty; technical support via email or WhatsApp (+0086 19859288691)
Technical FAQ
Q: Is the PR9268/201-000 a direct replacement for the Bently Nevada 330101-00-06-10-02-00?
A: Yes. The PR9268/201-000 is dimensionally and electrically compatible with the Bently Nevada 330101 8 mm series when used with an EPRO CON021 or CON041 conditioner. Verify gap voltage calibration after installation.
Q: Can this transducer be used without an EPRO conditioner?
A: No. The PR9268 requires a matched driver/conditioner to supply the oscillator excitation and demodulate the output. It is not a self-powered 4–20 mA device.
Q: What is the recommended installation gap?
A: The nominal installation gap is 1.0 mm (–10 VDC output), centered in the linear range. Refer to the EPRO calibration curve for target-material-specific adjustments.
Q: Do you provide calibration certificates?
A: Yes. A factory calibration data sheet is included with each unit. Third-party NIST-traceable calibration is available upon request at additional cost.
Q: What is the lead time for bulk orders (>10 units)?
A: Standard lead time is 3–7 business days for stock items. For larger quantities, contact us for a dedicated procurement timeline.
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