330171-00-94-10-02-00 | Bently Nevada | 3300 XL 5 mm Proximity Probe

Configured for non-contact vibration and shaft position sensing, the Bently Nevada 330171-00-94-10-02-00 (330171 5 mm Proximity Probe) provides direct physical execution of displacement measurements within machine monitoring platforms. This probe converts target distance variations into proportional voltage signals, serving as the primary input component for the 3300 XL transducer system.

Hardware Specifications

Eddy-Current Probe Scaling and Gap Voltage Validation

The 330171 probe is calibrated to a standard scale factor of 7.87 V/mm (200 mV/mil) relative to AISI 4140 steel targets. To ensure the linearity of the measurement, the system must be installed at a nominal gap voltage of -10 VDC. Deviation from this target gap voltage during operation indicates potential target material variation, probe surface fouling, or electrical impedance mismatches within the coaxial path. Efficient cross-talk suppression is achieved by strictly isolating the transducer signal cables from high-voltage AC paths and high-frequency switching circuits.

Frequently Asked Questions

Q: Is this probe compatible with standard 3300 XL series Proximitor sensors?

A: Yes, provided the total electrical length of the system is configured correctly. The probe is an integral part of the 3300 XL transducer system and must be paired with an impedance-matched extension cable and Proximitor sensor to maintain calibration.

Q: Can the integral cable be field-spliced if damaged?

A: No. Field-splicing coaxial cabling alters the characteristic impedance and dielectric capacitance of the signal path. This causes a shift in the probe scale factor, rendering the measurement data inaccurate.

Field Installation Guidelines

• Mounting Stability: Use the stainless steel housing to mount the probe in a rigid bracket. Ensure that the mounting surface does not contribute to resonance, which could manifest as false vibration readings.
• Shielding: Maintain shield continuity through all connections. The cable must be routed in dedicated metallic conduit to prevent electromagnetic interference (EMI) pickup.
• Connector Integrity: Use the ClickLoc connector protector to seal the interface against moisture and conductive dust. Confirm an audible click to ensure proper electrical mating.
• Target Alignment: The probe tip must be centered perpendicularly over the target shaft area. Misalignment will cause non-linear output and signal distortion during shaft rotation.