Bently Nevada 330101-10-40-10-02-05 3300 XL 8 mm Proximity Probe

The Bently Nevada 330101-10-40-10-02-05, also cataloged as the 330101 proximity probe, operates as a dedicated eddy‑current displacement sensor for rotor‑to‑probe gap measurement within 3300 XL monitoring systems. The probe provides defined mechanical geometry, a 1.0 m coaxial signal path, and stable field behavior for vibration, shaft‑position, and Keyphasor‑related acquisition.

Suffix Breakdown & Model Matrix

• 330101: Base model for the 3300 XL 8 mm proximity probe, 3/8‑24 UNF thread, without armor.

• -10: Unthreaded length of 1.0 in (standard 0.1 in increment coding).

• -40: Overall case length of 4.0 in.

• -10: Total cable length of 1.0 m (3.3 ft).

• -02: Miniature coaxial ClickLoc connector with standard cable.

• -05: CSA, ATEX, IECEx hazardous‑area approvals.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics Behavior

The probe follows the standard −10 VDC gap voltage scaling used across Bently Nevada proximity systems. This ensures linear displacement response when paired with the correct extension cable and Proximitor driver. The patented TipLoc molding stabilizes the eddy‑current field at the probe tip, while CableLoc reinforcement provides 330 N (75 lbf) pull strength to maintain coaxial geometry under mechanical stress. Cross‑talk suppression is inherent to the probe’s coaxial design, preserving rotor dynamics signatures even in dense cable bundles or high‑EMI environments.

Frequently Asked Questions

Q: Does the probe require exact cable matching for correct scaling? A: Yes. Eddy‑current probes must be paired with the specified cable length to maintain −10 VDC gap voltage calibration and linear displacement response.

Q: Can the probe be used for Keyphasor applications? A: Yes. The 3300 XL 8 mm probe supports Keyphasor and speed‑related measurements when installed with correct mechanical alignment.

Q: Is the probe suitable for high‑temperature bearing housings? A: The standard operating range of −51 deg C to +177 deg C supports typical fluid‑film bearing environments.

Field Installation Guidelines

• Maintain straight routing of the 1.0 m cable to avoid impedance variation.

• Align the probe tip perpendicular to the rotor surface for accurate displacement and Keyphasor measurement.

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

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

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