Bently Nevada 330854-040-24-00 – Proximity Probe for reliable shaft vibration and position monitoring

The Bently Nevada 330854-040-24-00 is part of the well-known 3300 XL proximity transducer system, used to measure shaft vibration, radial/axial position, and phase reference on critical rotating machinery. It’s a passive eddy-current probe that pairs with a matching 3300 XL Proximitor sensor and extension cable to deliver stable DC gap and dynamic AC vibration signals to your monitoring system. The “-040” option denotes a 4.0 m integral cable, which—combined with a matching extension cable—helps you reach the proximitor without signal loss in most turbine, compressor, and motor installations.

One thing I appreciate is how consistent the 3300 XL family behaves across different machines. You get tight linearity on standard 4140 steel targets and a signal chain that typically aligns with API 670 practices. From my experience, this model seems to be a smart pick when you need dependable displacement measurements and you want to keep spares aligned with existing Bently Nevada infrastructures.

Order Placement Process and Guarantees

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

Key Features

• 3300 XL transducer system compatibility – Pairs with matching 3300 XL Proximitor sensor and extension cable for calibrated displacement measurement.
• 4.0 m integral probe cable – The “-040” length helps bridge typical machine-case runs to junction points, reducing installation constraints.
• Eddy-current measurement on 4140 steel – Calibrated for standard AISI 4140 targets, which is typically what API 670 specifies for proximity systems.
• Stable DC gap and AC vibration output (via proximitor) – Easy to integrate with condition monitoring systems and DCS/PLC inputs.
• Rugged industrial design – Withstands harsh environments and temperature extremes common around turbines and compressors.
• Interchangeability within the family – You might notice reduced spares complexity when standardizing on 3300 XL probes, cables, and drivers.

Technical Specifications

Brand / Model	Bently Nevada 330854-040-24-00
Product Type	Proximity probe (eddy-current), 3300 XL system
HS Code	9031.80 – Other measuring or checking instruments
Power Requirements	Passive probe; powered via compatible 3300 XL Proximitor sensor (driver typically supplied from 24 VDC loops)
Integral Cable Length	4.0 m (denoted by “-040”)
Operating Temperature	Probe typically −51 to +177 °C, depending on installation and accessories
Signal I/O Types	Coaxial connection to proximitor; proximitor provides DC gap and dynamic AC vibration outputs
Communication Interfaces	None (analog sensor via proximitor)
Installation Method	Threaded case mounting with locknut or probe holder; connect to extension cable and 3300 XL Proximitor

Application Fields

This probe is used across critical rotating assets where reliable displacement measurement matters:

• Steam and gas turbines – radial vibration, shaft position, and phase reference (with Keyphasor setups)
• Compressors, expanders, and pumps – continuous vibration trending for protection systems
• Large motors and generators – bearing condition and thermal growth monitoring
• Gearboxes and test stands – precise shaft motion measurement for diagnostics

A maintenance supervisor told us, “We swapped in the 3300 XL probe with the same cable length, and it lined up with our calibrations right away—no curveballs during start-up.” That’s typical of the 3300 XL family in many cases.

Advantages & Value

• High reliability – Proven 3300 XL architecture designed for continuous service in harsh environments.
• System compatibility – Works with 3300 XL Proximitor sensors and extension cables already in your plant, reducing changeover risk.
• Lifecycle savings – Stable calibration and predictable performance lower troubleshooting time and unplanned downtime.
• Technical support – We can help match probe length and proximitor options to meet your exact cable-run and cabinet layout.

Installation & Maintenance

• Mounting – Install the probe in a rigid, threaded port aimed at the calibrated 4140 target surface. Use the locknut to secure depth.
• Gap setting – Set the gap to the recommended mid-range indicated by the proximitor output. A feeler gauge or dial-out via the driver output is typically used.
• Cabling – Route the integral cable to the extension cable, then to the proximitor. Maintain bend radius and proper shielding/grounding to avoid noise.
• Panel & cabinet – Mount the proximitor in a ventilated cabinet. Keep high-voltage and high-frequency lines separated from transducer wiring.
• Safety – De-energize the machine or follow plant lockout/tagout. Avoid mechanical contact between the probe tip and shaft.
• Routine care – Periodically verify gap voltage, check for cable abrasion, and ensure connectors are tight. Firmware updates apply to monitoring racks rather than the passive probe.

Quality & Certifications

• Designed for compliance with API 670 practices (proximity measurement on 4140 steel)
• CE and RoHS conformity typically available for 3300 XL components
• Manufactured under ISO 9001 quality systems
• Supplier warranty: 12 months from delivery

Commonly Paired Components

• 3300 XL Proximitor Sensor (matching driver for the probe system)
• 330130-0xx-00-00 Extension Cable (length to suit the installation)
• Monitoring racks and transmitters (e.g., Bently Nevada 3500 series, 3701/40, or 3308 transmitters)

If you’re consolidating spares, tell us your installed proximitor part numbers and required total cable length. We’ll cross-check the -040 probe length against the extension cable to keep the transducer pair within its calibrated range.