Bently Nevada 330104-00-02-50-02-00 3300 XL 8 mm Proximity Probe

The Bently Nevada 330104-00-02-50-02-00, also cataloged as the 330104 proximity probe, operates as a dedicated eddy‑current sensing element for rotor‑to‑probe displacement measurement within 3300 XL vibration monitoring systems. The assembly provides a 5.0 m signal path, a 20 mm case length, and a PPS‑based tip for stable mechanical‑to‑electrical transduction.

Suffix Breakdown & Model Matrix

Hardware Specifications

Eddy-Current Probe Scaling and Gap Voltage Validation

The 3300 XL 8 mm probe adheres to the standard −10 VDC gap voltage target used across Bently Nevada proximity systems. This scaling ensures predictable linear response when paired with matching extension cables and drivers. The PPS tip and stainless‑steel case maintain stable eddy‑current field geometry, reducing drift caused by thermal expansion. Cross‑talk suppression is inherent to the probe’s coaxial construction, preventing adjacent cable runs from influencing rotor dynamics measurements.

Frequently Asked Questions

Q: Does the probe require a specific extension cable length for correct scaling? A: Yes. Eddy‑current probes must be paired with the exact extension cable length defined by the part number to maintain −10 VDC gap voltage calibration.

Q: Can the probe be installed near high‑current conductors? A: It is not recommended. Electromagnetic fields may distort the eddy‑current sensing field, causing non‑linear displacement readings.

Q: Is the Viton O‑ring pressure‑tested before shipment? A: No. Standard probes are not pressure‑tested. Applications requiring verified sealing should use custom‑tested units.

Field Installation Guidelines

• Maintain straight, strain‑relieved routing of the 5.0 m cable to avoid impedance changes.

• Ensure the probe tip is aligned perpendicular to the rotor surface for accurate displacement measurement.

• Avoid tight bends near the ClickLoc connector to preserve coaxial geometry.

• Bond shielding at the driver end only to prevent ground‑loop interference.

• Verify gap voltage during commissioning to confirm correct mechanical positioning.