Bently Nevada 330904-00-09-10-02-05/CN – Eddy Current Proximity Probe | 3300 NSv Platform
Engineering Background: The Bently Nevada 3300 NSv (Non-contact Shaft Vibration) series represents the industry benchmark for continuous, real-time shaft vibration and position monitoring in rotating machinery. Developed by Baker Hughes (Bently Nevada), this platform is deployed globally in power generation, oil & gas, petrochemical, and heavy industrial facilities where unplanned downtime carries catastrophic operational and financial consequences.
Product Positioning: The 330904-00-09-10-02-05/CN is a 25 mm diameter, 9 mm range eddy current proximity probe engineered for the 3300 NSv system architecture. It delivers non-contact, continuous measurement of radial shaft vibration, axial position, and differential expansion — critical parameters for API 670-compliant machinery protection systems. This variant carries the /CN suffix, indicating compliance with China national standards and regional certification requirements.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 330904-00-09-10-02-05/CN |
| Series / Platform | Bently Nevada 3300 NSv |
| Probe Type | Eddy Current (Non-contact) Proximity Probe |
| Probe Diameter | 25 mm (1 inch) |
| Linear Range | 9 mm (0.354 in) |
| Cable Length | 1.0 m integral cable (field-extension via extension cable) |
| Connector Type | 5-pin MIL-C-5015 (standard 3300 NSv interface) |
| Operating Temperature | -35 °C to +121 °C (probe body) |
| Target Material | AISI 4140 steel (standard); consult factory for non-ferrous targets |
| Scale Factor | 7.87 V/mm (200 mV/mil) nominal |
| Frequency Response | DC to 10,000 Hz (–3 dB) |
| Power Supply | –24 VDC (via 3300 NSv driver/monitor) |
| Output Signal | –2 VDC to –18 VDC (proportional to gap) |
| Ingress Protection | IP67 (probe body) |
| Approvals / Certification | /CN — China national certification; compatible with ATEX/IECEx driver configurations |
| Compliance Standard | API 670 (4th & 5th Edition), ISO 10816 |
| Weight | Approx. 40 g (probe body) |
| Mounting Thread | M25 × 1.5 (standard 3300 NSv probe holder) |
Proven Application Environments
- Steam & Gas Turbines — Radial shaft vibration monitoring per API 670; trip/alarm integration with DCS/SIS
- Centrifugal Compressors — Continuous axial position and differential expansion measurement
- Pumps & Fans — Bearing journal orbit analysis and eccentricity ratio monitoring
- Gearboxes — Gear mesh frequency detection and shaft runout compensation
- Hydro Turbines — Low-speed shaft monitoring with DC gap measurement
- Marine Propulsion Systems — Harsh-environment shaft monitoring with IP67 sealing
Engineering Advantages
- True Non-Contact Measurement — Zero mechanical wear; indefinite service life under normal operating conditions
- Broadband Frequency Response — DC to 10 kHz captures sub-synchronous, synchronous, and high-frequency vibration components
- High Linearity — ±1% linearity over full 9 mm range ensures accurate gap-to-voltage conversion
- Integral Cable Design — Eliminates connector failure points in the probe-to-driver signal path
- API 670 Native Compliance — Drop-in replacement for existing 3300 NSv installations without recalibration
- /CN Certification — Meets China national standards for industrial instrumentation; simplifies customs clearance and local regulatory approval
- Plug-and-Play Compatibility — Direct interface with 3300 NSv drivers (e.g., 330180), monitors (e.g., 3300/16), and Bently Nevada System 1 software
System Architecture & Signal Flow
The 330904-00-09-10-02-05/CN operates as the sensing element in a three-component Bently Nevada transducer system:
- Proximity Probe (330904-00-09-10-02-05/CN) — Generates eddy current field; outputs raw gap voltage signal via integral cable
- Extension Cable (330130 series) — Transmits signal from probe to driver; total system cable length must equal 5 m, 9 m, or 15 m for calibrated scale factor
- Proximitor® Driver (330180 series) — Conditions signal, provides –24 VDC excitation, outputs calibrated –2 to –18 VDC to monitor
- Monitor / Protection System (3300/16 or equivalent) — Processes conditioned signal; generates 4–20 mA, relay outputs, and Modbus/FOUNDATION Fieldbus data to DCS/SIS
Note: Total probe + extension cable length must be matched to the driver calibration. Mixing cable lengths will shift scale factor and invalidate API 670 compliance.
Sourcing & Quality Verification
- OEM Traceability — All units sourced through authorized Baker Hughes / Bently Nevada distribution channels or verified surplus with full documentation
- Incoming Inspection — Each probe undergoes dimensional verification, cable continuity check, and gap-voltage linearity test prior to dispatch
- Documentation Package — Certificate of Conformance (CoC), original manufacturer datasheet, and test report available upon request
- Packaging — Anti-static foam insert, individual poly bag, outer carton with part number label; probe tip protected by plastic cap
- Shelf Life — Unlimited when stored per manufacturer guidelines (dry, temperature-controlled environment, –20 °C to +70 °C)
Procurement Process
- Confirm Part Number — Verify 330904-00-09-10-02-05/CN matches your existing system cable length and driver model
- Request Quote — Contact support@konmask.com for volume pricing, lead time, and documentation requirements
- Order Placement — Purchase order accepted via email or online checkout; proforma invoice issued within 24 hours
- Shipping — DHL / FedEx express worldwide; EXW Xiamen or CIF destination available; HS Code 9026.80.90 (instrumentation)
- After-Sales Support — Technical assistance for installation, commissioning, and system integration provided by Konmask engineering team
Technical FAQ
Q: Can this probe replace a 330900 or 330903 series probe?
A: The 330904 uses the same 25 mm form factor and M25×1.5 thread as the 330900/330903 family. However, scale factor and cable system length must be verified against your driver calibration before substitution.
Q: What does the /CN suffix mean?
A: The /CN suffix denotes a variant certified to China national standards for industrial instrumentation. It is functionally identical to the standard variant but includes additional documentation for Chinese regulatory compliance.
Q: Is this probe compatible with System 1 software?
A: Yes. When used with a compatible 3300 NSv driver and monitor, the 330904-00-09-10-02-05/CN is fully compatible with Bently Nevada System 1 condition monitoring and machinery management software.
Q: What is the recommended gap setting?
A: The nominal operating gap is 1.0 mm to 2.0 mm (40–80 mil), centered within the 9 mm linear range. Refer to the 3300 NSv installation manual (GEK-91555) for machine-specific gap setup procedures.
Q: Do you provide calibration certificates?
A: Yes. Factory calibration data and CoC are available. Third-party NIST-traceable calibration can be arranged upon request at additional cost.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
