Bently Nevada 330703-000-050-10-12-05 Proximity Probe

Bently Nevada 330703-000-050-10-12-05 Proximity Probes

Configured for 11 mm eddy‑current displacement measurement in 3300 XL systems, the Bently Nevada 330703-000-050-10-12-05 (330703 proximity probe) provides direct gap‑sensing output through a 50 mm case length, fully‑threaded body, and a 1.0 m FluidLoc‑protected coaxial cable. The assembly incorporates multiple hazardous‑area approvals under suffix 05.

Suffix Breakdown & Model Matrix

• 330703: 3300 XL 11 mm proximity probe, M14 x 1.5 thread
• 000: Unthreaded length = 0 mm (fully threaded)
• 050: Overall case length = 50 mm
• 10: Cable length = 1.0 m (3.3 ft)
• 12: FluidLoc miniature ClickLoc connector, standard non‑armored cable
• 05: CSA, ATEX, IECEx approvals

Hardware Specifications

Gap Voltage Validation and Eddy‑Current Scaling

The 330703 probe maintains the standard −10 VDC nominal gap‑voltage reference used across 3300 XL systems, enabling predictable displacement scaling within its 4.0 mm linear range. The FluidLoc connector stabilizes coaxial impedance and reduces micro‑motion noise, while the PPS tip and stainless‑steel case maintain thermal stability across the −52 deg C to +177 deg C operating envelope. Factory‑matched resistance ensures consistent rotor‑dynamic phase tracking and minimizes cross‑talk in multi‑probe installations.

Frequently Asked Questions

Q: Can the 330703 probe be replaced while the proximitor remains energized? A: Replacement should occur only with the channel de‑energized to avoid transient gap‑voltage excursions.

Q: Does the 1.0 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 CSA/ATEX/IECEx approvals affect electrical configuration? A: Approvals do not alter electrical behavior; installation and scaling remain identical to non‑approved variants.

Field Installation Guidelines

• Maintain clean M14 x 1.5 threads to ensure stable mechanical 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 FluidLoc connector engagement before energizing the monitoring channel.