Bently Nevada 330106-05-30-20-02-05 Proximity Probe

Bently Nevada 330106-05-30-20-02-05 3300 XL 8 mm Reverse Mount Probes

The Bently Nevada 330106-05-30-20-02-05, also cataloged as the 330106 reverse‑mount probe, serves as the primary 8 mm eddy‑current sensing element utilized to execute displacement and rotor‑dynamic measurement across 3300 XL reverse‑mount platforms. The probe implements a 2.0 m coaxial lead with ClickLoc termination and multiple approvals under suffix 05.

Suffix Breakdown & Model Matrix

• 330106: 8 mm reverse‑mount proximity probe
• 05: Reverse‑mount variant
• 30: Unthreaded/case configuration (input does not specify detailed segmentation)
• 20: Total cable length = 2.0 m (6.6 ft)
• 02: Miniature ClickLoc coaxial connector
• 05: Multiple agency approvals

Hardware Specifications

Gap Voltage Validation and Eddy‑Current Scaling

Reverse‑mount 3300 XL probes maintain the standard −10 VDC nominal gap‑voltage reference, enabling predictable displacement scaling across the 8 mm sensing range. The extended 2.0 m cable introduces additional coaxial impedance, but factory‑matched construction preserves phase stability and rotor‑dynamic accuracy. The PPS tip and stainless‑steel case maintain thermal stability, while the Viton O‑ring provides differential‑pressure sealing. ClickLoc termination ensures repeatable electrical seating and reduces cross‑talk in multi‑probe installations.

Frequently Asked Questions

Q: Can the reverse‑mount probe be replaced while the proximitor remains energized? A: Replacement should occur only with the channel de‑energized to prevent transient gap‑voltage excursions.

Q: Does the 2.0 m cable length require proximitor recalibration? A: No recalibration is required; the cable length is factory‑matched for standard 3300 XL proximitor modules.

Q: Do multiple approvals under suffix 05 affect installation? A: Approvals do not alter electrical behavior; installation requirements remain identical to standard 3300 XL probes.

Field Installation Guidelines

• Maintain clean mounting surfaces to ensure stable reverse‑mount seating.
• Terminate cable shielding at the proximitor end only to prevent ground‑loop formation.
• Avoid sharp bends that may alter coaxial impedance.
• Route cable away from high‑current conductors to reduce electromagnetic interference.
• Verify ClickLoc connector engagement before energizing the monitoring channel.