Bently Nevada 330103-00-03-10-02-CN 3300 XL Proximity Probe

Product Overview

The Bently Nevada 330103-00-03-10-02-CN is an 8 mm eddy current proximity probe part of the 3300 XL series. This transducer is engineered for non-contacting displacement and vibration measurements in critical machinery applications, including steam and gas turbines, centrifugal compressors, and industrial pumps. The 3300 XL system provides an advanced scale factor of 7.87 V/mm (200 mV/mil), offering high-fidelity data for radial vibration, axial position, and speed measurements.

This specific configuration features a 3/8-24 UNF thread with a 0.3-inch overall case length and is supplied without stainless steel armor. The assembly includes a 1.0-metre (3.3 feet) integral cable terminated with a miniature coaxial ClickLoc™ connector. The "CN" suffix indicates compliance with country-specific hazardous area certifications, including NEPSI approvals for the Chinese market. It is designed to operate within the 3300 XL Proximitor® sensor loop for reliable machinery protection and diagnostic monitoring.

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

Mechanical Mounting and Clearance:

The 330103 probe must be mounted in a rigid bracket to prevent false vibration readings caused by bracket resonance. Ensure a minimum side clearance of 13 mm (0.5 in) from metallic surfaces surrounding the probe tip to maintain the 7.87 V/mm scale factor. When installing the 0.3-inch case, use a torque wrench to ensure the 3/8-24 UNF threads do not exceed 13.5 N·m (120 in·lb) to prevent case distortion.

Loop Calibration:

The 3300 XL 8 mm probe is a component of a tuned resonant circuit. This 1.0-metre probe must be paired with the correct length of extension cable (e.g., 4.0 m or 8.0 m) to reach the required 5.0-metre or 9.0-metre total system length calibrated for the Proximitor® sensor. Deviation from the specified total length will result in significant sensitivity errors.

Field Wiring and Shielding:

The coaxial ClickLoc™ connector must be protected from environmental contamination. For internal machine applications, use oil-resistant heat-shrink tubing or connector protectors to prevent moisture and lubricant ingress. The shield of the extension cable must be grounded at the monitor end only to prevent ground loops that introduce 50/60 Hz noise into the vibration signal.

Target Material Requirements:

Standard calibration is performed using AISI 4140 steel. If the target shaft is composed of different materials (e.g., stainless steel or chrome-plated shafting), a Scale Factor Error will occur. Technical staff must apply a Material Correction Factor within the monitoring system configuration to ensure accurate displacement readings.

Maintenance & Troubleshooting FAQ

Q: Can this 1.0m probe be used as a standalone sensor?

A: No. A 1.0-metre probe must be connected to an extension cable. The Proximitor® requires a specific total loop impedance (5m or 9m) to maintain its linear output.

Q: What indicates a faulty ClickLoc connection?

A: Signal "spiking" or high-frequency noise in the monitor usually indicates a loose or contaminated coaxial connection. Inspect the center pin for continuity and ensure the connector is dry and free of metallic debris.

Q: How do I verify the DC gap voltage?

A: For a 3300 XL system, the nominal mid-range gap voltage is -10.0 Vdc. Use a voltmeter at the Proximitor terminals during installation to set the physical gap until this voltage is achieved.

Q: Is this probe compatible with older 3300 series monitors?

A: Yes, 3300 XL probes are generally backward compatible with 3300 systems, but it is recommended to use 3300 XL Proximitor sensors to take full advantage of the improved scale factor and temperature stability.