330905-12-22-05-02-05 | Bently Nevada | Non-contact Proximity Probe

Bently Nevada 330905-12-22-05-02-05 3300 NSv Proximity Probe

The Bently Nevada 330905-12-22-05-02-05, also cataloged as the 330905 proximity probe, operates as a dedicated hardware component for non‑contact displacement measurement within 3300 NSv eddy‑current monitoring systems. The probe establishes a controlled impedance path and stable gap‑voltage behavior required for NSv signal conditioning.

Suffix Breakdown & Model Matrix

• 330905 = 3300 NSv proximity probe, M10 × 1 thread
• 12 = Unthreaded length option
• 22 = Case length option (approx. 220 mm)
• 05 = Total probe length 0.5 m
• 02 = Miniature coaxial ClickLoc connector, standard cable
• 05 = Multiple agency approvals

Hardware Specifications

Eddy‑Current Scaling and Rotor‑Dynamic Signal Integrity

The probe maintains calibrated eddy‑current scaling when paired with NSv‑rated extension cables and proximitor modules. The 7.87 V/mm scale factor supports linear displacement interpretation across the typical 1.5 mm measurement range. Gap‑voltage behavior aligns with the −10 VDC reference used in NSv systems, ensuring stable rotor‑dynamic tracking. The PPS tip and stainless‑steel case provide mechanical rigidity, while controlled coaxial impedance suppresses cross‑talk in multi‑channel installations.

Frequently Asked Questions

Q: Does the 0.5 m cable length require a specific proximitor model? A: Yes. NSv probes must be paired with NSv‑rated proximitor modules to maintain factory‑matched impedance and linearity.

Q: Can the ClickLoc connector be field‑terminated? A: No. The connector is factory‑assembled. Field termination may alter impedance and degrade displacement accuracy.

Q: Is dual‑end shield bonding recommended? A: No. Shielding should be bonded at the proximitor end only to prevent ground‑loop formation.

Field Installation Guidelines

Ensure full engagement of the M10 × 1 threaded section to maintain probe‑to‑shaft alignment. Route the coaxial cable with gentle bend radii to preserve impedance stability. Maintain separation from high‑current conductors or variable‑frequency drive outputs to reduce electromagnetic interference. Apply strain relief to prevent vibration‑induced connector motion. Avoid overtightening to prevent thread deformation and maintain mechanical seating.