Bently Nevada 330703-000-040-10-02-00 Proximity Probe

Bently Nevada 330703-000-040-10-02-00 3300 XL 11 mm Proximity Probe

The Bently Nevada 330703-000-040-10-02-00, also cataloged as the 330703 11 mm Eddy Current Probe, operates as a dedicated hardware component for non-contact shaft displacement and rotor dynamics monitoring within 3500 Machinery Protection Systems.

Suffix Breakdown & Model Matrix

• Base Part Number: 330703 (3300 XL 11 mm Proximity Probe, M14 x 1.5 thread)
• Unthreaded Length Option (-000): 00 mm unthreaded case section
• Overall Case Length Option (-040): 40 mm overall case length
• Total Length Option (-10): 1.0 meter (3.3 feet) system total length
• Connector & Cable Type (-02): Miniature coaxial ClickLoc connector, standard cable
• Agency Approval Option (-00): Standard non-approved variant

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The 330703-000-040-10-02-00 transducer operates on the high-frequency eddy-current principle to measure shaft position and rotor dynamics relative to machine bearing structures. The system maintains an Incremental Scale Factor (ISF) of 3.94 V/mm (100 mV/mil) when paired with a matching 3300 XL 11 mm Proximitor Sensor powered by -24 VDC. Precise gap voltage validation (targeting -10 VDC at mid-span gap settings) ensures optimal magnetic field density and prevents signal distortion during dynamic rotor excursions. The triaxial cable geometry incorporates high-density braid shielding to achieve cross-talk suppression and immunity from adjacent channel high-frequency radio frequency interference.

Frequently Asked Questions

Q: What gap voltage reading corresponds to the center of the linear operating range for the 3300 XL 11 mm probe?

A: Setting the probe gap to approximately 2.5 mm (100 mils) yields a baseline DC gap voltage of -10 VDC at the Proximitor Sensor output terminals.

Q: Can the ClickLoc connector on the 330703-000-040-10-02-00 probe lead be disconnected while the monitoring circuit is energized?

A: The connector should not be unlatched while power is applied unless the area is confirmed to be non-hazardous, as physical disconnection may break intrinsic safety barrier loops.

Field Installation Guidelines

• Inspect the machine probe mounting port to verify M14 x 1.5 thread integrity and clean physical clearance prior to insertion.
• Thread the probe case into the bearing housing, monitoring DC gap voltage on a calibrated multimeter until reaching the target -10 VDC setpoint.
• Tighten the M14 locknut against the machine casing to a maximum rated torque of 63.3 N m to lock physical probe position.
• Snap the gold-plated miniature coaxial ClickLoc connector into the extension cable jack, ensuring the internal locking detent engages with an audible click.
• Verify that total cable routing avoids sharp housing edges and maintains minimum bend radii to preserve 75 ohm coaxial transmission parameters.