Description

Bently Nevada 330101-00-36-10-01-00 3300 XL 8mm Proximity Probe

The Bently Nevada 330101-00-36-10-01-00 is a high-performance eddy current sensor belonging to the 3300 XL 8mm Transducer System. This proximity probe is specifically engineered for non-contacting measurements of shaft vibration and position in critical rotating machinery. By establishing a precise electrical gap measurement between the probe tip and the target surface, it provides essential diagnostic data for monitoring radial vibration, axial thrust, and eccentricity in high-speed industrial equipment.

Technical Architecture and Configuration

This 3300 XL probe is built to maintain a linear scale factor of 7.87 V/mm (200 mV/mil) when connected to a compatible 3300 XL Proximitor sensor. Specifically, the model 330101 features a 3/8-24 UNF thread pattern and is optimized for standard industrial mounting. Furthermore, the gold-plated miniature coaxial connectors provide a secure, low-impedance interface that is resistant to corrosion and mechanical loosening. Consequently, the system ensures high-fidelity signal transmission from the machine internals to external monitoring racks, even in environments characterized by high temperatures and chemical exposure.

Technical Specification Matrix

Industrial Application and Reliability

The 330101-00-36-10-01-00 is a vital component in Turbine Supervisory Instrumentation (TSI). As a result, it is widely deployed on steam turbines, gas turbines, centrifugal compressors, and large pumps across the power generation and hydrocarbon processing sectors. Moreover, the inclusion of the “01” connector protector option ensures the signal junction is shielded from oil mist and moisture, which is critical for sensors mounted inside machine bearing housings. Therefore, this probe enables the early identification of rotor instability or bearing wear, preventing unplanned outages and extending the operational life of the machinery.

FAQ

What is the benefit of the 3.6-inch case length in this configuration?

The 3.6-inch case provides a mid-range reach that is suitable for most standard bearing housings and mounting brackets. Specifically, it allows the probe to be positioned correctly relative to the shaft while leaving enough thread clearance for locking nuts. Accordingly, you should verify your mounting depth requirements to ensure this case length is appropriate for your specific installation.

Is this probe compatible with older 3300 series Proximitors?

While the 3300 XL series is designed to be backward compatible with non-XL 3300 components, it is technically recommended to use the complete 3300 XL system to achieve maximum accuracy and thermal stability. Furthermore, mixing XL and non-XL components can slightly alter the system’s linear range and scale factor. As a result, you should consult your system manual if you are performing a partial upgrade of an older vibration monitoring loop.

How does the connector protector function?

The connector protector (indicated by the -01 suffix) is a factory-installed sleeve that covers the coaxial connection point. In addition, it prevents conductive fluids, such as lubricating oil or water, from bridging the connector terminals and causing signal drift or grounding issues. Consequently, this option is essential for any probe that will be submerged in or splashed by industrial fluids.

What is the maximum operating temperature for this probe?

This probe is rated for continuous operation in temperatures up to +177 °C (+351 °F). Moreover, the probe tip is constructed from high-strength polyphenylene sulfide (PPS), which maintains its structural integrity and dielectric properties at high temperatures. Ultimately, this allows for reliable vibration monitoring in the most demanding sections of high-temperature gas and steam turbines.