Bently Nevada 330905-00-21-10-02-05 – High-Sensitivity Eddy-Current Proximity Probe | 3300 NSv System
Engineering Background: The Bently Nevada 3300 NSv (Non-contact Vibration) Proximity Probe System is the industry benchmark for continuous, real-time shaft vibration and position monitoring in critical rotating machinery. Engineered to API 670 standards, the 3300 NSv platform has been deployed in power generation, oil & gas, petrochemical, and heavy industrial facilities worldwide for over three decades.
Product Positioning: The 330905-00-21-10-02-05 is a fully integrated eddy-current proximity probe designed for direct installation into the 3300 NSv monitoring system. It delivers sub-micron displacement resolution with exceptional thermal stability, making it the preferred choice for procurement engineers specifying vibration instrumentation on gas turbines, steam turbines, compressors, and large rotating equipment.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 330905-00-21-10-02-05 |
| Series / Platform | Bently Nevada 3300 NSv Proximity Probe System |
| Sensor Type | Eddy-Current (Non-contact) Proximity Probe |
| Measurement Range | 0 – 2.0 mm (0 – 80 mil) linear range |
| Scale Factor | 7.87 V/mm (200 mV/mil) nominal |
| Frequency Response | DC – 10,000 Hz (–3 dB) |
| Operating Temperature | –35 °C to +177 °C (–31 °F to +351 °F) |
| Probe Tip Diameter | 8 mm (0.315 in) |
| Cable Length | 2.1 m (7 ft) integral armored cable |
| Thread Size | M10 × 1.0 (metric) |
| Connector Type | 3-pin MIL-C-5015 style |
| Supply Voltage | –24 VDC (nominal, via Proximitor/Seismic Monitor) |
| Output Signal | –2 VDC to –18 VDC (proportional to gap) |
| Target Material | AISI 4140 steel (or equivalent ferromagnetic alloy) |
| Ingress Protection | IP67 (probe body) |
| Compliance Standards | API 670, CE, RoHS |
| Weight | Approx. 40 g (probe assembly) |
| Country of Origin | USA (Baker Hughes / Bently Nevada) |
Proven Application Environments
- Gas Turbines & Steam Turbines – Continuous shaft radial vibration and axial position monitoring per API 670
- Centrifugal & Axial Compressors – Real-time rotor dynamic measurement in high-pressure process gas environments
- Large Electric Motors & Generators – Bearing journal orbit analysis and differential expansion measurement
- Pumps & Fans – Eccentricity and runout detection for predictive maintenance programs
- Gearboxes – Gear mesh frequency analysis and shaft position trending
- Marine Propulsion Systems – Shaft monitoring in high-humidity, salt-spray environments (IP67 rated)
Engineering Advantages
- Sub-Micron Resolution – Detects displacement changes as small as 0.5 µm for early fault detection
- Wide Thermal Stability – Calibrated scale factor maintained across –35 °C to +177 °C operating range
- Armored Integral Cable – Stainless steel braid protects against mechanical damage, oil, and chemical exposure
- Direct 3300 NSv System Compatibility – Plug-and-play with Bently Nevada 3300 XL, 3300/16, and 3300/20 Proximitor monitors
- API 670 Compliant – Meets the most stringent international standard for machinery protection systems
- Long Service Life – Non-contact measurement principle eliminates mechanical wear; MTBF > 100,000 hours
System Architecture & Signal Flow
The 330905-00-21-10-02-05 probe operates as part of a three-component measurement chain:
- Proximity Probe (330905-00-21-10-02-05) – Generates a high-frequency electromagnetic field (1.0 MHz nominal) directed at the rotating shaft target.
- Extension Cable (330130 series) – Transmits the oscillator signal between probe and Proximitor with matched impedance. Total system cable length must be calibrated to 5 m, 9 m, or 15 m system length.
- Proximitor / Seismic Monitor (3300 XL series) – Demodulates the eddy-current signal and outputs a DC voltage proportional to probe-to-target gap. Interfaces directly with 3500 Series rack monitors or standalone 3300/16 monitors.
Note: This listing is for the probe assembly only. Extension cables and Proximitor monitors are available separately on Konmask.com.
Sourcing & Quality Verification
- Source: Sourced from authorized industrial distributors and verified OEM surplus channels
- Inspection: Each unit undergoes visual inspection, connector integrity check, and documentation verification prior to shipment
- Traceability: Original Bently Nevada part labels, date codes, and calibration documentation preserved where available
- Packaging: Ships in anti-static protective packaging with original or equivalent protective end caps
- Warranty: 90-day functional warranty against defects in materials and workmanship
Procurement Process
- Confirm Compatibility – Verify your Proximitor model and system cable length before ordering. Contact our engineering team if unsure.
- Request a Quote – Email support@konmask.com with your PO requirements, required delivery date, and quantity.
- Order Confirmation – We issue a proforma invoice within 1 business day with lead time and shipping options (DHL Express, FedEx International Priority, sea freight).
- Shipment & Documentation – Full commercial invoice, packing list, and certificate of conformance provided with every shipment.
- After-Sales Support – Technical support available via email and WhatsApp for installation and commissioning questions.
Technical FAQ
Q: Is the 330905-00-21-10-02-05 compatible with the Bently Nevada 3500 Series rack?
A: Yes. When paired with a 3300 XL Proximitor and appropriate extension cable, the output signal is fully compatible with 3500/42M and 3500/40M position monitor modules.
Q: What is the correct system cable length for this probe?
A: The 330905-00-21-10-02-05 uses a 2.1 m (7 ft) integral cable. The total probe + extension cable system must be calibrated to a standard length (5 m, 9 m, or 15 m). Select the appropriate 330130-XX extension cable accordingly.
Q: Can this probe measure non-ferromagnetic targets (e.g., titanium, aluminum)?
A: No. Standard 3300 NSv probes are calibrated for AISI 4140 steel targets. Non-standard target materials require a custom calibration factor. Contact us for application-specific guidance.
Q: What is the minimum order quantity?
A: We supply single units and bulk orders. No minimum order quantity applies. Volume pricing is available for orders of 5 units or more.
Q: Do you provide export documentation for international shipments?
A: Yes. We provide full commercial invoice, packing list, certificate of conformance, and ECCN classification documentation for all international orders.
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