Bently Nevada 330851-02-000-040-10-01-CN – Proximitor Sensor for precise shaft vibration and position monitoring

The Bently Nevada 330851-02-000-040-10-01-CN is part of the 3300-series proximity transducer family used on critical rotating machinery. From my experience, it’s typically paired with a 5 mm 3300 XL proximity probe and a matching extension cable to deliver stable, low-noise measurements of shaft vibration, radial position (gap), and keyphasor targets. You might notice that plants adopt this model when they need reliable, industry-standard 200 mV/mil (≈7.87 mV/µm) scaling into a 3500 rack or equivalent monitoring system.

Our Order Process & Guarantees

• Warranty: 365 days
• Lead time: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• Eddy-current proximity transducer – Designed for continuous monitoring of shaft vibration and radial position on turbines, compressors, pumps, and motors.
• Stable scale factor – Typically 200 mV/mil (≈7.87 mV/µm), making channel configuration straightforward across mixed assets.
• Robust noise immunity – Shielded wiring and proven electronics help maintain signal quality in high-EMI industrial environments.
• Works with 3300 XL probes – Commonly paired with 5 mm probes and matching extension cables to form a calibrated transducer system.
• Analog output to protection systems – Direct wiring into 3500/40M, 3500/42M or similar monitors; no special protocol required.
• Hazardous area options – The “-02” option typically denotes agency approvals for hazardous locations (subject to exact code variant).

Technical Specifications

Application Fields

You’ll typically see the 330851 on high-value rotating assets where vibration data is tied to trip logic and reliability KPIs:

• Gas/steam turbines and generators – shaft vibration, radial position, and differential expansion setups.
• Compressors and expanders – continuous protection and condition monitoring input to 3500 systems.
• Pumps and fans – early detection of imbalance, misalignment, or bearing degradation.
• Gearboxes – trendable vibration data for load-related diagnostics.

Advantages & Value

• Reliability under harsh conditions – Proven field performance near hot casings and high-EMI areas.
• Compatibility – Seamlessly integrates with Bently Nevada 3500 monitors and most legacy 3300 installations.
• Lifecycle savings – Standardized scaling reduces setup time and tuning mistakes during turnarounds.
• Support-ready – From my experience, standardized part coding simplifies spares planning and troubleshooting.

Customer note from a refinery maintenance lead: “Swapping in the 330851 with the correct 5 mm probe brought our vibration baseline back within a shift—no need to rework the rack configuration.”

Installation & Maintenance

• Cabinet & environment – Install in a clean, dry cabinet (IEC/UL-rated), with modest ventilation. Avoid routing near VFD power cables.
• Wiring – Use the specified probe and extension cable lengths for the calibrated system. Maintain shield continuity and proper grounding.
• Mounting – Secure the proximitor close to the machine or in a junction box to minimize noise pickup; keep probe cable runs as specified.
• Safety – For hazardous areas, ensure the option code and site approvals match the zone/class. De-energize before servicing.
• Routine checks – Verify gap voltage, observe vibration trend stability, clean terminals annually, and document any drift.
• Calibration – System calibration (probe + cable + proximitor) should be confirmed at installation and after component replacement.
• Firmware – Not applicable to the proximitor itself; keep connected monitor modules (e.g., 3500) updated as per vendor guidance.

Quality & Certifications

• Certifications – Typically CE and RoHS; hazardous-location approvals (e.g., ATEX/IECEx/CSA) depend on the exact option code (the “-02” variant is usually agency-approved).
• Manufacturing standards – Built for industrial duty; conforms to Bently Nevada’s proximity transducer system tolerances.
• Warranty – 365 days warranty from shipment.

Recommended Supporting Components

• 3300 XL 5 mm proximity probe (e.g., 330103-00-xx-xx) – choose thread and cable length to suit the bearing housing.
• 330130-0x-xx-xx extension cable – match length so the total system length aligns with calibration.
• 3500/40M or 3500/42M monitor channels – for protection and trending integration.

If you’re aligning this 330851-02-000-040-10-01-CN with an existing rack, share your current probe and cable part numbers and total system length. It seems to be the quickest way to confirm scaling and avoid nuisance alarms during startup.