BENTLY 330400-01-CN Proximitor Sensor for 3300 XL 5 mm Probes – Reliable Shaft Vibration and Position Measurement

The BENTLY 330400-01-CN is a 3300 XL 5 mm Proximitor Sensor designed for precise shaft vibration and axial position measurements on critical rotating equipment. From my experience, this model is the go-to when you need stable, repeatable readings and full compatibility with Bently Nevada 3300/3500 monitoring systems. The “-CN” suffix typically indicates a China-market label/documentation variant; functionally, it matches the global 330400-01 standard.

Our Order Process & Guarantees

• Warranty: 365 days
• Delivery: 1 week for 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

• 3300 XL 5 mm system calibration – Typically 200 mV/mil (≈7.87 mV/µm) sensitivity for clear vibration amplitude and gap readings.
• Paired with probe + extension cable – Works as a complete eddy-current system for shaft vibration/position (probe, extension cable, and this Proximitor sensor).
• Stable DC gap + dynamic output – Provides a DC gap voltage and an AC vibration signal back to the monitor for trending and protection.
• Compatible with 3300/3500 racks – Integrates neatly with Bently Nevada monitors (e.g., 3500/40M, 3500/42M), simplifying spares and maintenance.
• Industrial-grade build – Potted electronics and robust terminals help in high-vibration, oily, or thermally challenging environments.
• -CN localization – It appears that labels/documentation are prepared for the CN market, while electrical performance remains consistent with the standard 330400-01.

Technical Specifications

Application Fields

This sensor is commonly deployed on:

• Steam and gas turbines for radial vibration and rotor axial position
• Compressors and expanders where early detection of rubs and rotor instabilities matters
• Critical pumps and fans to trend bearing health and shaft runout
• Generators and large motors tied to API/ISO compliance programs

One thing I appreciate is how quickly maintenance teams can swap a Proximitor and be back online; in many cases, no re-engineering is needed when you keep to the 3300 XL 5 mm chain (probe + extension + Proximitor).

Advantages & Value

• Proven compatibility – Seamless fit with Bently Nevada 3300/3500 monitors reduces integration risk and commissioning time.
• Reliable linearity and sensitivity – Consistent response makes trending trustworthy and alarm settings easier to justify.
• Spares commonality – Keeps your spares strategy simple across multiple trains and sites.
• Lifecycle support – Typically supported with field-proven procedures, test kits, and global service coverage.

Installation & Maintenance

• Mounting environment: Place the Proximitor in a dry, vibration-limited enclosure or on a stable surface near the machine. Allow ventilation and avoid hot spots from steam lines.
• Wiring practices: Use the specified coax for probe/extension connections; maintain bend radius; ensure shields are grounded at the recommended point to minimize noise.
• Monitor connection: Terminate outputs to the designated 3300/3500 monitor channel; verify channel scale (200 mV/mil) and polarity during loop checks.
• Safety precautions: De-energize the channel before wiring; follow hazardous-area guidelines if applicable; route cables away from high-power conductors.
• Routine maintenance: Periodically check gap voltages, inspect connectors for oil ingress, clean terminals, and verify tightness. A quick shaft “lift-off” or micrometer check helps confirm calibration in most cases.

Quality & Certifications

• CE marking for EMC and safety (typical for this family)
• UL/cUL compliance for industrial control applications
• RoHS conformity for restricted substances
• ATEX/IECEx options may be available for hazardous areas depending on the ordered variant
• Manufacturer warranty: typically 1 year; we provide 365-day warranty coverage on supply

Related/Supporting Components (for a complete chain)

• 3300 XL 5 mm Proximity Probe – Matched probe for this Proximitor to ensure proper sensitivity and linear range.
• 3300 XL Extension Cable – Length options to suit machine layout while preserving calibration.
• 3500/40M or 3500/42M Monitor – Rack-based monitoring modules that accept Proximitor inputs for protection and trending.
• Buffered Output/Checkers – Handy for field verification and loop checks without disturbing protection channels.

You might notice this is a very “drop-in friendly” part—if your existing system is 3300 XL 5 mm, swapping or expanding points with 330400-01-CN is typically straightforward. If you’d like, share your probe/cable lengths and monitor model, and I’ll double-check sensitivity and linear range to keep everything aligned.