Bently Nevada 330903-00-18-10-02-05/CN – High-Precision Eddy Current Proximity Probe | 3300 NSv Platform
Engineering Background
The Bently Nevada 3300 NSv Series represents the industry benchmark for non-contacting eddy current measurement in rotating machinery protection systems. Developed to meet API 670 requirements, this series is deployed globally in gas turbines, steam turbines, compressors, and pumps where continuous shaft vibration and position monitoring is mission-critical. The 330903-00-18-10-02-05/CN is the Chinese-market variant of the standard 330903 probe, factory-configured for direct integration with 3300 NSv signal conditioning systems.
Product Positioning
This probe is engineered for procurement engineers and reliability teams sourcing OEM-equivalent replacement components for Bently Nevada 3300 NSv monitoring systems. It delivers the same dimensional, electrical, and sensitivity specifications as the original factory part, ensuring drop-in compatibility without recalibration of the monitoring rack.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 330903-00-18-10-02-05/CN |
| Series / Platform | Bently Nevada 3300 NSv |
| Probe Type | Eddy Current Non-Contacting Proximity Probe |
| Probe Tip Diameter | 18 mm (0.71 in) |
| Cable Length | 5 m (16.4 ft) — integral armored cable |
| Extension Cable | Not included (order separately: 330130 series) |
| Linear Range | 0.25 mm – 2.54 mm (10 – 100 mil) |
| Scale Factor (Sensitivity) | 7.87 V/mm (200 mV/mil) nominal |
| Frequency Response | DC to 10,000 Hz (–3 dB) |
| Operating Temperature | –35°C to +177°C (–31°F to +351°F) |
| Target Material | AISI 4140 steel (standard); other alloys require recalibration |
| Supply Voltage | –24 VDC (via 3300 NSv driver/monitor) |
| Output Voltage Range | –2 VDC to –18 VDC |
| Connector Type | Integral coaxial, compatible with 3300 NSv driver |
| Housing Material | 316 Stainless Steel |
| IP Rating | IP67 (probe body) |
| Compliance | API 670, CE, RoHS |
| Weight | Approx. 40 g (probe body) |
| Country of Origin | United States |
Proven Application Environments
- Gas Turbines — Radial shaft vibration and axial position monitoring on GE, Siemens, and Solar turbines
- Steam Turbines — Continuous rotor displacement measurement in power generation plants
- Centrifugal Compressors — API 670-compliant vibration protection on pipeline and refinery compressors
- Pumps & Fans — Eccentricity and runout measurement on high-speed rotating equipment
- Gearboxes — Gear mesh frequency analysis and shaft orbit monitoring
- Marine Propulsion — Shaft monitoring in harsh, high-humidity environments
Engineering Advantages
- Drop-In OEM Replacement — Identical dimensional and electrical specifications; no rack reconfiguration required
- Extended Temperature Range — Rated to +177°C, suitable for hot-section turbine installations
- Armored Integral Cable — 5 m stainless-steel-braided cable resists mechanical damage and EMI in industrial environments
- High Frequency Response — DC to 10 kHz bandwidth captures sub-synchronous, synchronous, and high-frequency vibration components
- 316 SS Housing — Corrosion-resistant body suitable for wet, chemical, and offshore environments
- API 670 Compliant — Meets international standard for machinery protection systems
System Architecture & Signal Flow
The 330903-00-18-10-02-05/CN operates as the sensing element in a three-component Bently Nevada eddy current measurement chain:
- Probe (330903-00-18-10-02-05/CN) — Generates an oscillating electromagnetic field; detects target proximity via impedance change
- Extension Cable (330130 series) — Transmits the high-frequency signal from probe to driver; total system cable length must match driver calibration
- Driver / Signal Conditioner (3300 NSv) — Converts probe impedance change to a calibrated DC voltage output (–2 to –18 VDC); interfaces with 3500 or 3300 monitoring racks
Note: Total probe + extension cable length must equal the value specified in the driver part number. Mismatched cable lengths will cause scale factor error and require field recalibration.
Sourcing & Quality Verification
- All units are sourced from authorized Bently Nevada distribution channels or verified surplus with full traceability documentation
- Each probe is inspected for physical integrity, connector condition, and cable continuity prior to shipment
- Certificate of Conformance (CoC) and original packaging available upon request
- Serialization and date codes verified against Bently Nevada manufacturing records where applicable
- Konmask.com maintains a quality management process aligned with ISO 9001 principles for industrial component sourcing
Procurement Process
- Confirm Compatibility — Verify your existing driver part number and total cable length requirement before ordering
- Request a Quote — Contact support@konmask.com for volume pricing, lead time, and documentation packages
- Place Order — Secure checkout via Konmask.com; payment by T/T, credit card, or PayPal accepted
- Shipping — DHL / FedEx express worldwide; export documentation and commercial invoice included
- After-Sales Support — Technical support available for installation verification and system integration questions
Technical FAQ
Q: Is the 330903-00-18-10-02-05/CN compatible with the Bently Nevada 3500 monitoring rack?
A: Yes. The 3300 NSv probe system is fully compatible with the 3500 series monitors when used with the appropriate 3300 NSv driver module.
Q: Can this probe be used with a non-Bently Nevada driver?
A: Not recommended. The 3300 NSv probe is calibrated for use with Bently Nevada drivers. Third-party drivers may produce scale factor errors unless independently calibrated.
Q: What is the difference between the standard 330903-00-18-10-02-05 and the /CN variant?
A: The /CN suffix denotes the Chinese-market configuration. Electrically and dimensionally identical to the standard part; the suffix is used for regional distribution tracking and customs documentation.
Q: What target material is assumed for the factory calibration?
A: AISI 4140 steel. If your shaft material differs (e.g., Inconel, titanium, or stainless steel), a material correction factor or field recalibration is required.
Q: Do you provide a Certificate of Conformance?
A: Yes. CoC is available upon request at time of order. Please specify your documentation requirements when contacting us.
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