3300 XL 8 mm Proximity Probe Bently Nevada 330103-00-04-10-11-00

Configured for eddy-current vibration and position measurement in rotating machinery, the Bently Nevada 330103-00-04-10-11-00 (330103 3300 XL 8 mm Proximity Probe) provides a direct non-contact measurement interface for the associated Proximitor sensor and extension cable system. The probe uses an M10 x 1 thread, 40 mm case length, 1.0 m cable, and miniature coaxial ClickLoc connector with FluidLoc cable.

Hardware Specifications

Eddy-Current Scaling and Gap Voltage

The 330103 probe operates as part of an eddy-current transducer system. The probe senses changes in the electrical impedance produced by the conductive shaft target, while the associated Proximitor sensor converts the probe response into a proportional electrical signal.

The specified scale factor is 7.87 V/mm (200 mV/mil), with an interchangeability tolerance of +/- 6.5% under the stated standard target conditions. Therefore, installation should maintain the specified probe-to-target geometry and use the applicable Bently Nevada calibration procedure.

For field validation, technicians should verify the probe gap voltage against the configured Proximitor system before placing the machinery protection channel into service. A nominal -10 VDC gap target is commonly used for Bently Nevada eddy-current systems, but the exact acceptance value must follow the applicable system documentation.

Frequently Asked Questions

Q: What type of measurement does the 330103 probe perform?
A: It performs non-contact eddy-current measurement of shaft position and dynamic shaft motion relative to the probe tip.

Q: What target material supports the stated sensitivity specification?
A: The supplied specification identifies AISI 4140 steel as the standard target material for calibration.

Q: Does the probe operate as a standalone measurement device?
A: No. The probe forms part of a complete transducer system that includes the probe, extension cable, and Proximitor sensor.

Field Installation Guidelines

1. Install the probe using the specified M10 x 1 threaded mounting arrangement and maintain mechanical alignment with the shaft target.
2. Keep the probe tip free from mechanical contact with the rotating shaft. Confirm adequate physical clearance throughout shaft rotation.
3. Route the miniature coaxial cable away from high-current power conductors, variable-frequency drive outputs, and strong electromagnetic interference sources.
4. Connect the ClickLoc connector fully and inspect the connector protector before commissioning the measurement channel.
5. Maintain appropriate cable routing and avoid excessive bending, pulling, or mechanical loading at the connector and probe body.
6. Verify probe polarity, cable continuity, Proximitor compatibility, and system calibration before enabling machinery protection functions.
7. Measure and document the installed gap voltage during commissioning. Use the applicable Bently Nevada system manual for the final acceptance limits.
8. Confirm that the probe mounting surface remains mechanically stable under operating vibration and that the threaded assembly cannot rotate after installation.