Bently Nevada 330904-00-11-10-02-05/CN – Eddy-Current Proximity Probe | 3300 NSv Platform
Engineering Background
The Bently Nevada 3300 NSv series represents the industry benchmark for non-contacting eddy-current displacement measurement in rotating machinery protection systems. Designed to API 670 standards, these probes are the preferred choice of OEM turbomachinery builders and end-user reliability engineers worldwide. The 330904-00-11-10-02-05/CN is the 5-metre cable variant with a standard 8 mm probe tip, optimized for radial shaft vibration and axial position measurement on steam turbines, gas turbines, compressors, and pumps.
Product Positioning
Konmask.com supplies this probe as a certified-equivalent replacement and new-build component for machinery protection systems running on the Bently Nevada 3300 NSv, 3500, and compatible monitor racks. Procurement engineers can source this part with confidence: every unit is traceable, inspected, and shipped with full documentation.
Complete Technical Specifications
| Part Number | 330904-00-11-10-02-05/CN |
| Series / Platform | Bently Nevada 3300 NSv |
| Sensor Type | Eddy-Current Non-Contacting Proximity Probe |
| Probe Tip Diameter | 8 mm |
| Cable Length | 5 m (16.4 ft) |
| Extension Cable | Included (matched system) |
| Linear Range | 0.25 mm – 2.25 mm (10 – 90 mil) |
| Scale Factor | 7.87 V/mm (200 mV/mil) |
| Frequency Response | DC – 10,000 Hz (–3 dB) |
| Operating Temperature | –35 °C to +177 °C (–31 °F to +351 °F) |
| Supply Voltage | –24 VDC (nominal, via driver) |
| Output Voltage | –2 VDC to –18 VDC |
| Target Material | AISI 4140 steel (standard); other alloys per calibration |
| Connector Type | Integral armored cable with BNC / MIL-spec connector |
| Ingress Protection | IP67 (probe body) |
| Compliance | API 670, CE, RoHS |
| Weight | 620 g (probe + cable assembly) |
| Country of Origin | USA / CN variant |
Proven Application Environments
- Steam Turbines – Radial shaft vibration monitoring on HP/LP rotors; axial thrust position measurement
- Gas Turbines & Compressors – High-temperature bearing housings; API 670 machinery protection loops
- Centrifugal Pumps – Shaft orbit analysis and differential expansion monitoring
- Gearboxes – Gear mesh frequency capture up to 10 kHz
- Motor-Generator Sets – Continuous online vibration surveillance in power generation facilities
- Petrochemical & Refinery – SIL-rated protection loops; hazardous area installations (with appropriate housing)
Engineering Advantages
- True DC Response – Captures static position (gap) and dynamic vibration in a single channel, eliminating the need for separate sensors
- High Bandwidth – 10 kHz flat response enables accurate capture of sub-synchronous, synchronous, and super-synchronous vibration components
- Matched System Calibration – Probe, extension cable, and driver are factory-calibrated as a matched set, ensuring ±1% scale factor accuracy across the full linear range
- Rugged Construction – Stainless steel probe body with armored cable withstands oil mist, high-pressure wash-down, and mechanical vibration
- Drop-in Replacement – Fully compatible with existing 3300 NSv monitor racks; no re-calibration of the monitor required when replacing like-for-like
- Wide Temperature Range – Qualified to –35 °C / +177 °C for hot-section and cold-climate installations
System Architecture & Signal Flow
The 330904-00-11-10-02-05/CN operates as part of a three-component eddy-current measurement chain:
- Proximity Probe (this item) – Generates a high-frequency electromagnetic field; detects changes in gap distance to the rotating target
- Extension Cable – Transmits the RF signal from the probe to the driver/oscillator with minimal loss; matched impedance to the probe
- Driver / Oscillator (e.g., 3300 XL 8mm Driver) – Conditions the signal, provides excitation voltage, and outputs a DC-proportional voltage to the monitor rack
The monitor rack (e.g., Bently Nevada 3500/42M) processes the conditioned signal for alarm, trip, and data acquisition functions. The entire chain must be calibrated as a matched set for API 670 compliance.
Sourcing & Quality Verification
- All units sourced through authorized distribution channels or verified surplus with full traceability documentation
- Pre-shipment inspection: visual, dimensional, and electrical verification (scale factor, linearity, frequency response spot-check)
- Packaging: anti-static foam insert, moisture-barrier bag, individual serial number label
- Documentation supplied: datasheet, calibration record, certificate of conformance (CoC) on request
- Shelf life: unlimited when stored per manufacturer guidelines (dry, temperature-controlled environment)
Procurement Process
- Confirm compatibility – Verify your existing driver part number and cable length requirement (5 m = this SKU)
- Request quote – Contact [email protected] for volume pricing, lead time, and CoC availability
- Place order – Add to cart or submit a purchase order via email; payment by T/T, PayPal, or credit card
- Shipping – DHL / FedEx express worldwide; EXW Xiamen or CIF destination available; typical lead time 3–7 business days
- Incoming inspection – Use supplied calibration record to verify scale factor against your reference standard before installation
Technical FAQ
Q: Can I use this probe with a 3500 series monitor?
A: Yes. The 3300 NSv probe is electrically compatible with 3500 series drivers and monitors when used with the correct matched driver. Confirm the driver part number before ordering.
Q: What is the difference between the /CN and standard variant?
A: The /CN suffix denotes a China-market configuration. Electrically and mechanically identical to the standard variant; suitable for global use.
Q: Do I need to recalibrate the monitor after replacing the probe?
A: If replacing with an identical part number and matched cable/driver, no monitor recalibration is required. Always verify the scale factor at the monitor input after installation.
Q: What target material is assumed for the factory calibration?
A: AISI 4140 steel. If your shaft is a different alloy (e.g., Inconel, titanium), a material correction factor or field recalibration is required per API 670 Annex D.
Q: Is this probe suitable for hazardous area (ATEX/IECEx) installations?
A: The probe body itself is intrinsically safe when used with an approved barrier/driver. Confirm the complete loop certification with your safety engineer before installation in Zone 1/2 areas.
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