Bently Nevada 330704-000-060-10-02-00 3300 XL 11 mm Proximity Probe

Configured for high-frequency vibration and axial position sensing, the Bently Nevada 330704-000-060-10-02-00 (330704 Proximity Probe) provides direct physical execution of non-contact displacement measurement within the 3300 XL transducer platform. This probe converts target distance variations into proportional voltage signals, acting as the primary sensing element for rotor dynamics monitoring.

Suffix Breakdown & Model Matrix

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The 330704 probe is factory-calibrated to a standard scale factor of 7.87 V/mm (200 mV/mil) for AISI 4140 steel targets. To ensure the linearity of the measurement, the system must be installed at a nominal gap voltage of -10 VDC at the Proximitor sensor output. Deviation from this target during machine operation indicates potential target material variation, probe surface fouling, or electrical impedance mismatches. Efficient cross-talk suppression is maintained by isolating signal cables from high-voltage AC paths and switching noise sources to prevent the introduction of electromagnetic interference into the transducer loop.

Frequently Asked Questions

Q: Is this 11 mm probe electrically compatible with 8 mm Proximitor sensors?

A: No. The Proximitor sensor must be matched to the specific coil inductance and tip diameter of the 11 mm probe to maintain a valid scale factor and system linearity.

Q: Can the integral cable be shortened during field installation?

A: No. Shortening the coaxial cable alters the characteristic impedance and capacitive loading of the sensor loop, which introduces measurement errors and voids the factory calibration.

Field Installation Guidelines

• Probe Gap Setting: Thread the probe into the mounting bracket until the required gap is achieved, then secure using the locking nut. Ensure the tip is centered over the target surface to minimize signal non-linearity.
• Shielding: Maintain shield continuity through the coaxial connectors. The shield must be bonded to the system common only at the Proximitor terminal block to prevent ground loops.
• Connector Integrity: Use the ClickLoc interface for connection. Ensure the interface is free of moisture and debris. An audible "click" confirms the connector is properly seated.
• Cable Routing: Adhere to the minimum static bend radius of 25.4 mm (1.0 inch). Avoid subjecting the cable to tension or sharp kinks that could deform the internal coaxial geometry.