Bently Nevada 330102-00-40-50-01-00 3300 XL 8 mm Proximity Probe

The Bently Nevada 330102-00-40-50-01-00, also cataloged as the 330102 3300 XL 8 mm Proximity Probe, provides non-contact eddy-current measurement of shaft displacement and vibration when connected to a compatible 3300 XL Proximitor Sensor.

Hardware Specifications

Eddy-Current Measurement and Rotor Dynamics

The 3300 XL 8 mm probe generates an eddy-current field at the conductive shaft target. The associated Proximitor Sensor converts changes in probe-to-target distance into an electrical output proportional to shaft displacement.

The nominal scale factor is 7.87 V/mm (200 mV/mil). Therefore, installation must establish the specified probe gap and verify the resulting bias or gap voltage at the Proximitor Sensor. For machinery monitoring applications, the probe axis should remain aligned with the intended rotor displacement direction.

The 2.0 mm (80 mils) linear range supports measurement of radial or axial shaft movement, depending on the mechanical arrangement. Proper probe orientation also reduces measurement errors caused by target geometry and installation tolerances.

Frequently Asked Questions (FAQ)

Q: Does the probe operate as a standalone measurement device?

A: No. The probe requires a compatible 3300 XL Proximitor Sensor to provide excitation and convert the eddy-current response into the monitoring signal.

Q: What target material provides the specified measurement performance?

A: AISI 4140 steel provides the specified reference target condition. Other conductive materials can produce different electrical response characteristics.

Q: What should technicians verify during installation?

A: Technicians should verify the 3/8-24 UNF mounting thread, probe alignment, mechanical clearance, cable routing, connector engagement, shielding, and the resulting probe gap voltage at the compatible Proximitor Sensor.

Field Installation Guidelines

1. Install the probe using the specified 3/8-24 UNF mounting interface and maintain mechanical alignment with the monitored shaft target.
2. Set the probe-to-target gap according to the applicable 3300 XL system installation procedure. Then verify the electrical gap voltage at the connected Proximitor Sensor.
3. Route the coaxial cable away from high-current power conductors, switching devices, and other sources of electromagnetic interference.
4. Avoid sharp bends, excessive mechanical tension, abrasion, and unnecessary movement of the cable near the probe and connector.
5. Engage the miniature coaxial ClickLoc connector completely and inspect the connector protector before commissioning.
6. Maintain the probe sealing interface and inspect the Viton O-ring for damage when the installation requires environmental or differential-pressure sealing.
7. Connect the cable shield according to the installed 3300 XL monitoring system grounding scheme. Avoid creating unintended ground paths through mechanical mounting hardware.
8. After installation, verify signal polarity, probe gap voltage, mechanical clearance, and the expected displacement response before placing the machinery protection channel into service.