Bently Nevada 330901-00-36-10-11-05 3300 NSv Proximity Probe

Bently Nevada 330901-00-36-10-11-05 3300 NSv Proximity Probe

The Bently Nevada 330901-00-36-10-11-05, also cataloged as the 330901 proximity probe, operates as a dedicated hardware component for shaft-relative displacement measurement within 3300 NSv eddy-current monitoring systems. It provides a calibrated analog displacement signal derived from eddy-current interaction with metallic targets.

Suffix Breakdown & Model Matrix

• 330901: 3300 NSv proximity probe, 1/4-28 UNF thread, without armor
• 00: Unthreaded length option (0.0 in)
• 36: Case length of 3.6 in
• 10: Total cable length of 1.0 m (approx. 39 in)
• 11: Miniature coaxial ClickLoc connector with protector, FluidLoc cable
• 05: CE marking with hazardous-area / regional approvals

Hardware Specifications

Eddy-current Scaling and Gap-voltage Stability

The 330901 NSv probe maintains calibrated eddy-current scaling across its linear operating range when paired with NSv proximitor modules. Standard -10 VDC gap-voltage validation ensures correct biasing and confirms probe-to-proximitor matching during commissioning. The FluidLoc cable design prevents fluid ingress along the cable path, preserving coaxial impedance and reducing susceptibility to induced noise. ClickLoc connector shielding suppresses cross-talk between adjacent vibration channels, improving rotor-dynamics phase correlation when multiple probes are installed around the same shaft.

Frequently Asked Questions

Q: Can the probe be disconnected while the proximitor remains energized? A: This is not recommended. Removing the probe under power can generate transient gap-voltage disturbances. De-energize the monitoring channel before replacement.

Q: Does the FluidLoc cable influence displacement calibration? A: Cable type and length are part of the matched probe-extension-proximitor system. Any change in cable impedance or length alters calibration and should not be modified.

Q: How should the ClickLoc connector be verified during installation? A: Ensure full mechanical engagement. Partial seating can introduce intermittent displacement readings due to unstable coaxial contact.

Field Installation Guidelines

• Use shielded coaxial cabling with the shield bonded at the proximitor end only to avoid ground-loop formation.
• Maintain proper bend radius on the FluidLoc cable to preserve impedance and reduce micro-motion noise.
• Keep cabling separated from high-voltage or high-frequency conductors to minimize electromagnetic interference.
• Ensure the 1/4-28 UNF threaded section is fully seated in the mounting bracket for stable mechanical coupling.
• Apply strain relief at the probe body to prevent connector movement under machine vibration.
• Validate gap voltage during commissioning; a stable -10 VDC bias indicates correct proximitor-probe matching.