Bently Nevada 330101-00-30-05-02-00 3300 XL Proximity Probe

Product Overview

The Bently Nevada 330101-00-30-05-02-00 is a high-performance 8 mm eddy current proximity probe belonging to the 3300 XL series. This transducer is a primary component for vibration monitoring, radial position, and axial thrust measurement in critical rotating machinery, including steam turbines, centrifugal compressors, and industrial pumps. Utilizing the eddy current principle, it provides a non-contacting method to observe the target shaft's movement relative to the machine housing.

This specific configuration features a 3/8-24 UNF thread with a 3.0-inch overall case length and is supplied without stainless steel armor. With a total electrical length of 0.5 metres (1.6 feet), it is intended for internal mounting applications where the probe is installed through a machine casing and connected to an extension cable. The assembly utilizes the ClickLoc miniature coaxial connector, ensuring signal integrity through vibration-resistant coupling.

Technical Configuration

Ordering Information

This assembly is defined by its alphanumeric suffix codes. Procurement and engineering teams must verify all parameters to ensure mechanical fit and electrical compatibility with the system loop.

Engineering & Installation Guide

Mounting Clearances:

To ensure a linear output and prevent "side-view" interference, a minimum side clearance of 13 mm (0.5 in) from metallic surfaces must be maintained around the probe tip. If installing multiple probes in a single radial bearing plane, maintain a minimum spacing of 40 mm (1.6 in) between probe centers to avoid crosstalk.

Loop Calibration and Cable Length:

The 3300 XL 8 mm probe is part of a tuned system. This 0.5-metre probe must be paired with an extension cable to reach the total system length (typically 5.0 or 9.0 metres) required by the 3300 XL Proximitor Sensor. Using a probe/cable combination that does not match the Proximitor’s calibrated length will result in significant sensitivity errors.

Connector Integrity:

The ClickLoc connector (-02) is designed for reliable signal transmission but is sensitive to environmental contamination. During installation, ensure connectors are free of moisture, oil, and metallic debris. The use of connector protectors or silicone heat-shrink tubing is recommended for internal machine environments to prevent connector loosening due to vibration.

Mechanical Installation:

The 3/8-24 UNF threads should be tightened to a maximum torque of 13.5 N·m (120 in·lb). Over-torquing can lead to case distortion or thread stripping, which may compromise the hermetic seal of the probe tip.

Maintenance & Troubleshooting FAQ

Q: Can this 0.5m probe be used as a standalone sensor?

A: No. A 0.5-metre probe is designed to be connected to an extension cable. The 3300 XL Proximitor requires a total loop length (e.g., 5m or 9m) to function within its linear range.

Q: What should the DC gap voltage be for a standard installation?

A: For a 3300 XL system, the nominal mid-range gap voltage is typically -10.0 Vdc. Set the physical gap during installation to reach this voltage at the Proximitor output for optimal linear range.

Q: How do I handle a "Probe Not Found" or "Not OK" status on the monitor?

A: Check the continuity of the center pin on the ClickLoc connector. Ensure the total resistance of the probe (center to outer conductor) is within factory limits (typically 3.0 to 12.0 ohms depending on cable length).

Q: Is this probe compatible with the original 3300 system?

A: While 3300 XL probes are generally compatible with older 3300 systems, there may be slight differences in the scale factor. It is best practice to use 3300 XL components throughout the entire signal string.