Bently Nevada 330880-16-15-020-01-02 – PROXPAC XL Proximity Transducer | 3300 XL Series Platform
Engineering Background: The Bently Nevada 3300 XL Series represents the industry benchmark for non-contacting eddy-current proximity measurement in rotating machinery protection. Engineered to API 670 standards, this platform has been deployed across power generation, petrochemical, and heavy industrial facilities worldwide for over three decades. The PROXPAC XL configuration integrates probe, extension cable, and proximitor into a single pre-calibrated assembly, eliminating field calibration errors and reducing installation time.
Product Positioning: The 330880-16-15-020-01-02 is a complete PROXPAC XL assembly designed for radial vibration, axial position, and differential expansion measurement on critical rotating equipment. Its integrated design ensures consistent gap voltage linearity and signal integrity from day one — a critical requirement for turbine, compressor, and pump protection systems where measurement accuracy directly impacts machinery uptime and safety.
Complete Technical Specifications
- Part Number: 330880-16-15-020-01-02
- Series / Platform: Bently Nevada 3300 XL PROXPAC XL
- Assembly Type: Integrated Proximity Transducer Assembly (Probe + Extension Cable + Proximitor)
- Probe Tip Diameter: 16 mm (standard eddy-current)
- Probe Length: 15 mm active sensing element
- Extension Cable Length: 2.0 m (020 = 2.0 m)
- Output Configuration: 01 (standard output)
- Connector Type: 02 (standard connector)
- Measurement Type: Radial vibration, axial position, differential expansion
- Output Signal: –24 VDC nominal bias; –200 mV/mil (–7.87 V/mm) sensitivity
- Linear Range: 0.25 mm to 2.25 mm (10 mil to 90 mil)
- Frequency Response: DC to 10,000 Hz (–3 dB)
- Operating Temperature: –35°C to +121°C (probe); –35°C to +66°C (proximitor)
- Power Supply: –24 VDC (±10%)
- Target Material: AISI 4140 steel (standard); other alloys with derating
- Compliance Standard: API 670 (5th Edition)
- Weight: Approx. 340 g (complete assembly)
- Country of Origin: USA (Baker Hughes / Bently Nevada)
Proven Application Environments
- Steam & Gas Turbines: Shaft radial vibration and thrust position monitoring on LP/HP turbine stages
- Centrifugal Compressors: Rotor dynamic monitoring in API 670-compliant protection systems
- Pumps & Fans: Continuous vibration surveillance on critical process pumps
- Gearboxes: Gear mesh frequency and shaft orbit analysis
- Electric Motors: Bearing journal vibration monitoring on large induction motors
- Expanders / Turboexpanders: High-speed rotor position and vibration in cryogenic service
- Marine Propulsion: Shaft monitoring in offshore and marine drive systems
Engineering Advantages
- Pre-Calibrated PROXPAC Assembly: Factory-matched probe, cable, and proximitor eliminate field calibration — critical for API 670 compliance and commissioning speed
- XL Extended Temperature Range: Rated to +121°C probe tip temperature, suitable for hot-section turbine bearing housings
- High EMI Immunity: Shielded coaxial extension cable rejects electrical noise in VFD-heavy environments
- Plug-and-Play Compatibility: Direct replacement for existing 3300 XL installations — no reconfiguration of 3500 rack monitors required
- Long-Term Linearity Stability: Eddy-current technology provides drift-free measurement over multi-year service intervals
- Reduced Installation Risk: Integrated assembly eliminates connector mismatch and impedance errors common with field-assembled systems
System Architecture & Signal Flow
The PROXPAC XL 330880-16-15-020-01-02 operates within the Bently Nevada 3300 XL / 3500 monitoring architecture as follows:
- Probe Tip → Generates eddy-current field; gap change modulates oscillator frequency
- Extension Cable (2.0 m) → Transmits RF signal from probe to proximitor with minimal loss
- Proximitor Module → Demodulates RF signal; outputs –200 mV/mil DC voltage proportional to gap
- 3500 Monitor Input Card → Receives DC voltage; applies alarm/trip setpoints per API 670
- 3500 System 1 Software → Trend logging, orbit plots, and machinery diagnostics
The integrated PROXPAC design ensures the probe-cable-proximitor impedance chain is factory-verified, eliminating the most common source of measurement error in field-assembled systems.
Sourcing & Quality Verification
- Genuine OEM Parts: All units sourced through verified Baker Hughes / Bently Nevada authorized distribution channels
-
4-Step Inspection Protocol:
- Visual inspection — housing, connector, cable jacket, and label integrity
- Electrical continuity — coil resistance and cable shield verification
- Gap voltage linearity check — output verified against factory calibration curve
- Documentation review — serial number, date code, and certificate of conformance
- Traceability: Each unit ships with original manufacturer documentation where available
- Packaging: Anti-static, moisture-barrier packaging with foam-lined transit case
Procurement Process
- Confirm Part Number: Verify 330880-16-15-020-01-02 matches your probe diameter, cable length, and connector requirements
- Submit Inquiry: Contact [email protected] with quantity, delivery timeline, and destination port
- Receive Quotation: Formal quotation with lead time, shipping terms (EXW/FOB/CIF), and payment options within 24 hours
- Order Confirmation: Purchase order accepted; inspection report and packing list issued
- Shipment & Tracking: DHL / FedEx / sea freight with full tracking; export documentation included
- After-Sales Support: Technical assistance available post-delivery for installation and commissioning
Technical FAQ
Q: Is the 330880-16-15-020-01-02 compatible with the Bently Nevada 3500/25 monitor?
A: Yes. The PROXPAC XL output (–200 mV/mil, –24 VDC bias) is fully compatible with all 3500 Series proximity input cards including the 3500/25 and 3500/40M.
Q: Can this transducer be used on non-ferrous target materials?
A: The standard calibration is for AISI 4140 steel. For stainless steel, titanium, or other alloys, a derating factor applies. Contact our engineering team for target-specific calibration data.
Q: What is the maximum shaft speed this transducer can monitor?
A: The 3300 XL proximity system has a frequency response of DC to 10,000 Hz, supporting shaft speeds up to 600,000 RPM for 1× vibration measurement (application-dependent).
Q: Is a Certificate of Conformance available?
A: Yes. CoC documentation is provided with each unit where available from the original manufacturer. Contact us prior to order if CoC is a mandatory procurement requirement.
Q: What is the lead time for this part number?
A: Standard lead time is 3–7 business days for in-stock units. For large quantities or urgent requirements, contact [email protected] for expedited options.
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