Bently Nevada 330101-00-20-90-12-00 3300 XL 8 mm Proximity Probe

Bently Nevada 330101-00-20-90-12-00 3300 XL 8 mm Proximity Probe

The Bently Nevada 330101‑00‑20‑90‑12‑00, also cataloged as the 330101 3300 XL 8 mm Proximity Probe, operates as a dedicated eddy‑current transducer for radial vibration, axial position, and speed/phase reference measurements on fluid‑film bearing machines.

Suffix Breakdown & Model Matrix

• 330101 — 3300 XL 8 mm proximity probe with 3/8‑24 UNF thread, without armor
• 00 — Unthreaded length option (0.0 in)
• 20 — Overall case length option (2.0 in)
• 90 — Cable length = 9.0 m (29.5 ft)
• 12 — Miniature coaxial ClickLoc connector with high‑temperature/specialized cable configuration
• 00 — Agency approval option (none / standard)

Hardware Specifications

Eddy-Current Probe Scaling

The 330101 probe employs eddy‑current scaling to convert shaft displacement into a proportional voltage signal. Gap voltage validation (targeting approximately ‑10 VDC reference) ensures linearity across the 2 mm measurement span. This scaling supports rotor dynamics analysis and suppresses cross‑talk between adjacent probes, enabling accurate diagnostics in multi‑channel monitoring systems.

Frequently Asked Questions

Q: Can the 330101‑00‑20‑90‑12‑00 be hot‑swapped during operation? A: No. Probes must be disconnected only when the system is de‑energized to preserve calibration integrity.

Q: How does the probe maintain compatibility with extension cables? A: It is fully interchangeable with standard 3300 XL extension cables and Proximitor sensors without requiring bench recalibration.

Q: What is the typical sensitivity of the probe? A: The probe provides ~200 mV/mil output across its defined linear range.

Field Installation Guidelines

• Do not cut or modify the probe cable; factory termination preserves calibration.
• Maintain proper bend radius to avoid altering coaxial geometry.
• Route cables away from high‑frequency switching conductors to reduce induced noise.
• Ensure ClickLoc connector is fully seated before energizing the system.
• Confirm installation practices comply with site standards for high‑temperature cable configurations.