Bently Nevada 330103-00-03-90-12-05 3300 XL 8 mm Proximity Probe

Configured for displacement measurement in rotating machinery, the Bently Nevada 330103-00-03-90-12-05 (330103-00-03-90-12-05 Proximity Probe) provides direct physical signal transduction for vibration and position monitoring.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The 330103-00-03-90-12-05 transducer operates on the eddy-current principle, requiring a calibrated scale factor of 7.87 V/mm (200 mV/mil). During site commissioning, gap voltage validation against the -10 VDC target midpoint is mandatory to ensure the sensor operates within its linear displacement range. Accurate gap adjustment is critical for monitoring rotor dynamics, including shaft centerline positioning and vibration magnitude. When installing multiple probes on a single bearing, adequate physical spacing must be maintained to provide effective cross-talk suppression and ensure signal integrity between adjacent channels.

Frequently Asked Questions

Q: Is the 9.0 metre total system length adjustable in the field?

A: No. The 330103 system is factory-calibrated as a matched set, including the probe, extension cable, and Proximitor sensor. Field-modifying the cable length alters the electrical impedance and resonant frequency, which will introduce significant measurement errors.

Q: Are these probes pressure-tested for high-pressure installations?

A: The probe includes a Viton O-ring seal to manage differential pressure; however, standard units are not pressure-tested before shipment. For high-pressure process sealing, contact the manufacturer for custom design and testing services.

Field Installation Guidelines

• Mounting: Secure the probe in a rigid, non-conductive bracket to prevent mechanical resonance. Ensure the probe tip is perpendicular to the target shaft.
• Grounding: The probe case is electrically conductive; verify the installation bracket is bonded to the machine housing to maintain electromagnetic immunity.
• Connector Integrity: Use the ClickLoc connector mechanism for all coupling points. Clean the connector faces with an approved electrical contact cleaner before assembly to minimize signal attenuation.
• Cable Routing: Route the coaxial cable through dedicated metallic conduit, maintaining separation from high-voltage AC lines to prevent induced noise on the displacement signal.