Bently Nevada 330881-28-09-123-03-02 – PROXPAC XL Proximity Transducer Assembly | 3300 XL Series
Engineering Background
The Bently Nevada 3300 XL Series represents the industry benchmark for non-contact eddy-current proximity measurement in rotating machinery protection. Designed to meet API 670 requirements, the 3300 XL system delivers continuous, real-time shaft vibration, position, and speed data to plant DCS and safety systems without physical contact or wear.
Product Positioning
Part number 330881-28-09-123-03-02 is a complete PROXPAC XL Proximity Transducer Assembly — a factory-matched, pre-calibrated probe-cable-driver set engineered for direct drop-in replacement or new installation on turbines, compressors, pumps, and other critical rotating assets. Procurement engineers specify this assembly when uptime, measurement accuracy, and OEM traceability are non-negotiable.
Complete Technical Specifications
- Part Number: 330881-28-09-123-03-02
- Series / Platform: Bently Nevada 3300 XL PROXPAC
- Assembly Type: Proximity Transducer System (Probe + Extension Cable + Driver)
- Sensing Technology: Eddy-Current (Non-Contact)
- Probe Tip Diameter: 8 mm
- Cable Length (Probe): 0.9 m (per part number suffix -09)
- Extension Cable Length: 12.3 m (per suffix -123)
- Driver Type: 3300 XL NSv Proximitor® (integrated)
- Output Signal: –24 VDC nominal; –200 mV/mil (–7.87 V/mm) scale factor
- Measurement Range: 25–200 mil (0.635–5.08 mm) linear range
- Frequency Response: DC to 10,000 Hz
- Supply Voltage: –24 VDC (–18 to –26 VDC operating range)
- Operating Temperature: –35 °C to +121 °C (probe); –35 °C to +85 °C (driver)
- Target Material: AISI 4140 steel (standard); other alloys with calibration
- Ingress Protection: IP67 (probe and cable assembly)
- Connector: 3-pin MIL-spec (driver output)
- Compliance: API 670, CE, RoHS
- Weight: 820 g (complete assembly)
- Country of Origin: United States
Proven Application Environments
- Steam and gas turbines (radial vibration, axial position, differential expansion)
- Centrifugal and reciprocating compressors
- Boiler feed pumps and large motor-driven equipment
- Petrochemical, LNG, and refinery rotating machinery trains
- Power generation — combined-cycle and nuclear balance-of-plant
- Offshore platform critical rotating assets
Engineering Advantages
- Factory-matched assembly: Probe, cable, and driver are calibrated as a system — eliminates field calibration errors and ensures OEM-specified scale factor accuracy.
- API 670 compliance: Meets machinery protection standard for radial vibration, axial position, and speed measurement channels.
- Non-contact measurement: Zero mechanical wear; suitable for continuous 24/7 operation in high-temperature, high-speed environments.
- Wide frequency response (DC–10 kHz): Captures sub-synchronous, synchronous, and high-frequency vibration components for comprehensive machinery diagnostics.
- Robust IP67 sealing: Resistant to process fluids, steam, and washdown in harsh plant environments.
- Direct compatibility: Plug-and-play with Bently Nevada 3500 Series rack monitors and System 1 software — no signal conditioning adapters required.
System Architecture & Signal Flow
The 330881-28-09-123-03-02 assembly operates as a three-component eddy-current chain:
- Probe (8 mm tip): Generates a high-frequency electromagnetic field; detects shaft surface displacement via impedance change.
- Extension Cable (12.3 m): Transmits the RF signal from probe to driver with matched impedance; routed through conduit or cable tray to the junction box or monitor rack.
- NSv Proximitor® Driver: Demodulates the RF signal and outputs a DC-proportional voltage (–200 mV/mil) to the 3500 monitor input card. The driver also provides the –24 VDC excitation to the probe.
Signal output connects directly to Bently Nevada 3500/40M, 3500/42M, or 3500/46M monitor modules for alarm, danger, and relay logic processing.
Sourcing & Quality Verification
- All units sourced from authorized distributors or verified OEM-surplus channels with full traceability documentation.
- Each assembly undergoes incoming inspection: visual, dimensional, and functional output verification against OEM datasheet tolerances.
- Certificate of Conformance (CoC) and test report available upon request.
- Serialized packaging with tamper-evident seals; original Bently Nevada labeling preserved.
- Long-term storage units maintained in climate-controlled ESD-safe environment.
Procurement Process
- Submit RFQ: Contact [email protected] with your PO number, required delivery date, and shipping destination.
- Receive Quote: Pricing, lead time, and availability confirmed within 1 business day.
- Order Confirmation: Pro-forma invoice issued; payment via T/T, PayPal, or trade terms for approved accounts.
- Shipment: DHL / FedEx express worldwide; EXW Xiamen or CIF available. Export documentation (commercial invoice, packing list, CoC) included.
- After-Sales: 12-month warranty against manufacturing defects; technical support from our automation engineering team.
Technical FAQ
- Q: Is this a complete assembly or individual components?
- A: This is a complete, factory-matched PROXPAC XL assembly — probe, extension cable, and NSv Proximitor® driver are included and pre-calibrated as a system.
- Q: Which Bently Nevada monitors is this compatible with?
- A: Directly compatible with the 3500 Series rack (3500/40M, 3500/42M, 3500/46M) and legacy 3300 Series monitors. Also interfaces with System 1 software via the monitor rack.
- Q: Can the scale factor be recalibrated for non-standard target materials?
- A: Yes. Bently Nevada provides target material correction factors. For alloys other than AISI 4140, a field calibration using the actual shaft material is recommended per API 670 Annex D.
- Q: What is the lead time for this part?
- A: In-stock units ship within 2–3 business days. For out-of-stock inquiries, typical lead time is 2–4 weeks depending on sourcing channel.
- Q: Do you provide export documentation for customs clearance?
- A: Yes. Full export documentation is provided: commercial invoice, packing list, Certificate of Conformance, and HS code declaration (HS 9031.80).
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