Bently Nevada 330103-040-00-00 – 8 mm Proximity Probe for Reliable Shaft Vibration and Position Monitoring

The Bently Nevada 330103-040-00-00 is an 8 mm eddy-current proximity probe with a 4.0 m integral cable, designed for critical rotating machinery. It’s part of the 3300 XL transducer system and pairs with a matching 3300 XL Proximitor Sensor and an extension cable to form either a 5 m or 9 m calibrated system. From my experience, this probe is the go-to choice when you want stable 200 mV/mil (7.87 mV/µm) output and dependable linearity for API 670–style condition monitoring on turbines, compressors, and high-speed pumps.

One thing I appreciate is how straightforward it is to match the system length: the “-040” denotes a 4.0 m probe lead, so you simply choose an extension cable length that completes your 5 m or 9 m total. Maintenance teams like it because it typically drops in with minimal rework. A refinery maintenance lead told me they swapped in this exact code to keep a 5 m system length without recalibrating the monitors—just a clean gap setup and it ran smoothly.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 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

• 8 mm probe tip: Standard for API 670 applications with strong signal-to-noise on larger shafts.
• 4.0 m integral cable: The “-040” length simplifies system configuration with matching extension cables.
• Calibrated system output: Typically 200 mV/mil (7.87 mV/µm) when used with the proper 3300 XL Proximitor Sensor.
• Non-contact eddy-current measurement: Stable shaft vibration and position readings with minimal drift.
• High-temperature capability: Probe tip typically up to 177 °C, suitable for hot bearing housings and turbine casings.
• Compatibility: Works with 3300 XL Proximitor Sensors and 330130 series extension cables to achieve 5 m or 9 m system lengths.
• Rugged construction: Industrial-grade coax, reliable connectors, and mechanical stability for long service life.

Technical Specifications

Application Fields

This probe is typically used across turbomachinery and high-speed rotating assets:

• Steam and gas turbines — radial vibration, differential expansion, and shaft position
• Centrifugal compressors — monitoring bearings and seals for early fault detection
• Large pumps and fans — unbalance, misalignment, and rub detection
• Generators and gearboxes — continuous protection and trending in DCS/asset systems

Advantages & Value

• Reliability that plants trust: Stable calibration and low drift, even in hot, high-vibration zones.
• Installed-base compatibility: Works with existing 3300 XL Proximitor hardware and typical API 670 setups.
• Lower lifecycle cost: Long service intervals and fast field replacement help reduce downtime.
• Simple spares strategy: Clear length code (“040”) simplifies stocking and site standardization.
• Support-ready: Easy to guide technicians through gap setting and loop checks; minimal learning curve.

Installation & Maintenance

• Mounting: Use the correct thread adapter or mounting bracket; set the mechanical gap (typically around 1.0 mm/40 mil unless your spec states otherwise). Secure with the locknut to prevent probe movement.
• Cable routing: Avoid tight bends and hot spots; maintain minimum bend radius and keep the coax away from high-voltage cables. Connect the probe to the extension cable, then to the Proximitor.
• System length: Match total cable length to the Proximitor type (commonly 5 m or 9 m systems). Mixing lengths can shift calibration.
• Cabinet & wiring: Install the Proximitor in a ventilated cabinet with proper shielding and grounding. The Proximitor typically requires a clean −24 Vdc supply.
• Checks & care: Periodically verify the gap and tighten hardware during outages; wipe probe tips clean; document readings to track trends. No firmware is involved—this is an analog transducer system.
• Safety: Lock out the machine, follow site hot-work rules, and confirm hazardous-area approvals when applicable.

Quality & Certifications

• CE compliant; RoHS compliant
• Manufactured under ISO 9001 quality systems
• UL/CSA approvals are typically available on the 3300 XL system components
• Warranty: 365 days (replacement or repair as applicable)