Bently Nevada 330103-00-09-20-02-00 3300 XL 8 mm Proximity Probe

The Bently Nevada 330103-00-09-20-02-00, also cataloged as the 330103 proximity probe, operates as a dedicated eddy‑current sensing element for rotor‑to‑probe displacement measurement within 3300 XL monitoring platforms. The probe provides a 90 mm case length, a 2.0 m coaxial signal path, and a PPS‑based sensing tip for stable non‑contact measurement.

Suffix Breakdown & Model Matrix

• 330103: Base model for the 3300 XL 8 mm proximity probe.

• -00: Unthreaded length option of 0 mm.

• -09: Case length of 90 mm (3.5 in).

• -20: Total cable length of 2.0 m (6.6 ft).

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

• -00: Standard agency approval; no hazardous‑area certification.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics Behavior

The 3300 XL 8 mm probe adheres to the standard −10 VDC gap voltage scaling used across Bently Nevada proximity systems. This ensures predictable linear displacement response when paired with the correct extension cable and Proximitor driver. The probe supports a linear measurement range of 0.25 mm to 2.3 mm (10 to 90 mils), delivering approximately 7.87 V/mm (200 mV/mil) sensitivity. Its coaxial construction suppresses cross‑talk, maintaining clean rotor‑dynamic signatures even in dense cable trays. Mechanical tolerances of the PPS tip and stainless‑steel case preserve the eddy‑current field geometry under thermal cycling and mounting stress.

Frequently Asked Questions

Q: Must the probe be paired with a specific extension cable length? A: Yes. Eddy‑current probes require exact cable length matching to maintain correct −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 sensing field and affect linearity.

Q: Is the probe suitable for high‑temperature bearing housings? A: The −52 deg C to +177 deg C range supports typical fluid‑film bearing environments.

Field Installation Guidelines

• Maintain straight routing of the 2.0 m cable to preserve coaxial impedance.

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

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

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

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