Bently Nevada 330905-00-12-05-02-RU – NSv Eddy Current Proximity Probe | 3300 XL Series Platform
Engineering Background
The Bently Nevada 330905-00-12-05-02-RU is a factory-calibrated NSv (Non-contacting vibration) eddy current proximity probe engineered for continuous shaft vibration, position, and eccentricity measurement in rotating machinery. It operates within the proven Bently Nevada 3300 XL Series ecosystem — the global standard for turbomachinery protection and condition monitoring in power generation, oil & gas, and petrochemical industries.
Product Positioning
Designed for procurement engineers and reliability teams requiring OEM-grade sensing accuracy with direct drop-in compatibility for existing 3300 XL monitor racks. The RU connector variant ensures secure, vibration-resistant field termination in harsh plant environments. Konmask.com supplies verified OEM units with full traceability documentation available on request.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 330905-00-12-05-02-RU |
| Series / Platform | Bently Nevada 3300 XL NSv |
| Sensor Type | Eddy Current Proximity Probe (Non-contacting) |
| Probe Tip Diameter | 5 mm (0.197 in) |
| Cable Length | 2 m (6.56 ft) integral armored cable |
| Connector Type | RU (Reverse-thread, vibration-resistant) |
| Sensitivity | 7.87 V/mm (200 mV/mil) nominal |
| Linear Range | 0.25 – 2.25 mm (10 – 90 mil) |
| Frequency Response | DC to 10,000 Hz (–3 dB) |
| Operating Temperature | –35°C to +121°C (–31°F to +250°F) |
| Target Material | AISI 4140 steel (standard calibration) |
| Supply Voltage | –24 VDC (via Proximitor® driver) |
| Output Signal | –2 to –18 VDC (proportional to gap) |
| Ingress Protection | IP67 (probe body) |
| Approvals | CE, ATEX, IECEx (consult datasheet for zone ratings) |
| Weight | Approx. 50 g |
| Compatible Driver | 3300 XL 8mm Proximitor® (330180 series) |
Proven Application Environments
- Steam & Gas Turbines — Shaft radial vibration and thrust position monitoring per API 670
- Centrifugal Compressors — Continuous eccentricity and differential expansion measurement
- Pumps & Fans — Bearing journal orbit analysis and rotor dynamic studies
- Gearboxes — Gear mesh frequency detection and torsional vibration analysis
- Electric Motors — Air gap monitoring and rotor bar pass frequency detection
- Expanders / Turbines (Petrochemical) — High-temperature, high-speed shaft monitoring in classified hazardous areas
Engineering Advantages
- OEM Factory Calibration — Each probe ships with a calibration certificate traceable to NIST standards; no field recalibration required at installation
- Armored Integral Cable — Stainless steel braid protects against mechanical damage, EMI, and chemical exposure in aggressive plant environments
- RU Reverse-Thread Connector — Prevents accidental disconnection under vibration; rated for 500+ mating cycles
- Wide Frequency Bandwidth — DC to 10 kHz response captures sub-synchronous, synchronous, and high-frequency vibration components simultaneously
- Direct System Compatibility — Plug-and-play replacement for all 3300 XL monitor channels without reconfiguration or re-ranging
- Hazardous Area Rated — ATEX/IECEx certified for Zone 1/Zone 21 installation without additional barriers in most configurations
System Architecture & Signal Flow
The 330905-00-12-05-02-RU operates as the sensing element in a three-component measurement chain:
- Probe (330905-00-12-05-02-RU) → Generates eddy current field; gap change modulates oscillator frequency
- Extension Cable (330130 series, if required) → Transmits RF signal from probe to Proximitor driver; total cable system must match calibrated length
- Proximitor® Driver (330180 series) → Demodulates RF signal; outputs –2 to –18 VDC proportional to shaft gap; powers the probe at –24 VDC
Note: The total probe + extension cable system length must equal the calibrated length (2 m for this part number). Mixing cable lengths will shift the output scale factor and introduce measurement error.
Sourcing & Quality Verification
- Units sourced from authorized Bently Nevada / Baker Hughes distribution channels
- Each unit inspected for physical integrity, connector condition, and cable continuity prior to dispatch
- Original OEM packaging and documentation preserved where available
- Calibration certificates and material traceability documents available upon request
- Counterfeit risk mitigation: holographic OEM labels, date codes, and serial number verification performed at intake
Procurement Process
- Confirm Compatibility — Verify your Proximitor driver model (330180 series) and existing cable system length matches this 2 m probe
- Request Quote — Contact support@konmask.com for volume pricing, lead time, and documentation package
- Place Order — Purchase directly via Konmask.com; secure checkout with bank transfer, credit card, and T/T options
- Shipping — DHL / FedEx express worldwide; export documentation (CO, packing list, commercial invoice) included
- Incoming Inspection — Use provided calibration certificate to verify unit against your acceptance criteria before installation
Technical FAQ
Q: Can this probe be used with a 3300 NSv monitor without an extension cable?
A: Yes. The 2 m integral cable is the complete calibrated system length for this part number. No extension cable is required or recommended unless the installation geometry demands it — in which case a matched extension cable must be added and the total system re-verified.
Q: What is the difference between the RU and standard connector variants?
A: The RU (Reverse-thread Unified) connector uses a left-hand thread that tightens under vibration rather than loosening, making it the preferred choice for high-vibration installations. Electrically and metrologically identical to standard connector variants.
Q: Is this probe compatible with the older 3300 (non-XL) monitor series?
A: The NSv probe series is optimized for the 3300 XL platform. Compatibility with legacy 3300 monitors should be verified against the specific monitor’s input specifications before installation.
Q: What target materials require recalibration?
A: The standard calibration is for AISI 4140 steel. Targets with significantly different electrical conductivity or magnetic permeability (e.g., titanium, Inconel, stainless steel) require a material-specific calibration factor. Contact Bently Nevada or Konmask for correction factor data.
Q: Do you provide ATEX documentation for hazardous area installations?
A: Yes. ATEX/IECEx certificates and installation drawings are available upon request for qualified purchasers.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
