The Bently Nevada 330850-51-CN is an original replacement part for the industry-standard 3300 XL proximity transducer system used on critical rotating machinery. In a complete 3300 XL chain—proximity probe + extension cable + Proximitor® driver—each part is chosen to maintain a specific calibrated system length. Using the correct 330850-51-CN component preserves linearity and sensitivity so your Bently Nevada 3500 rack (e.g., 3500/40M and 3500/42M) receives a clean, low-noise displacement signal for reliable vibration monitoring and API-style machinery protection.

What it does

• Delivers stable shaft vibration and radial position measurements for turbines, compressors, large pumps, gearboxes and fans.

• Supports Keyphasor/phase reference for balancing and diagnostics.

• Minimizes electrical noise and drift, improving long-term condition monitoring and analytics.

Why OEM matching matters

The 3300 XL system is calibrated as a whole. Mixing mismatched probe/cable/Proximitor parts or lengths can shift sensitivity and create scaling errors at the monitor. The 330850-51-CN keeps the chain within spec so your trends, alarms and trips remain trustworthy, reducing nuisance trips and preventing missed faults.

Typical applications

• Continuous radial vibration on journal bearings

• Shaft axial position/thrust (with appropriate probe orientation)

• Phase/keyphasor pickup for speed/angle reference

• Integration with DCS/ESD via Bently Nevada 3500 machinery protection

Selection help

Send your existing probe, extension cable and Proximitor part numbers (and required total system length). Seven Star LLC will validate compatibility of 330850-51-CN or recommend the correct 3300 XL alternative for your machine tag.

What’s included

• One genuine Bently Nevada 330850-51-CN spare with manufacturer labeling

• Pre-shipment BOM check to protect calibration and uptime

• Commercial docs and global shipping support

Installation note: Set the correct gap and verify monitor configuration after replacement. Follow the latest Bently Nevada manuals for wiring and polarity.

Why Seven Star LLC

We supply OEM vibration & protection hardware with fast sourcing, documentation, and engineering validation so your assets return to service quickly—no guessing, no mismatched parts.

FAQs

1) Is 330850-51-CN compatible with my 3500 rack?

Yes. It’s designed for Bently Nevada 3300 XL chains feeding 3500/40M, 3500/42M and related modules, provided the probe/cable/driver lengths match.

2) Do I need to recalibrate after replacement?

Field calibration isn’t required if the system length and part numbers are identical, but you must verify gap and monitor scaling.

3) Can I mix different 3300 XL lengths?

No. Mixing lengths/components changes sensitivity. Keep the original BOM or ask us to recommend a correct, matched set.

4) Which machines use this spare?

Steam/gas turbines, centrifugal compressors, large pumps, gearboxes, fans and other journal-bearing assets.

5) Do you provide documentation?

Yes—COC (when available), datasheet, and packing list. Ask if you need country-of-origin or compliance letters.

6) How fast can you ship?

Lead time depends on stock and region. Send your needed date and delivery terms in the RFQ.

Call to Action:

Ready to confirm compatibility and pricing? Request a quote now and our team will review your BOM and respond quickly.