Description

The Bently Nevada 330101-00-11-20-02-00 is an unarmored 8 mm proximity probe engineered for highly precise, non-contact machinery displacement and vibration monitoring. This specific configuration features a fully threaded 1.1-inch overall case length with 0.0 inches of unthreaded length, integrated with a 2.0-meter (6.6 feet) standard coaxial cable terminating in a miniature ClickLoc connector. Designed for direct installation within machinery bearing housings, this non-armored probe is optimized for applications where external conduits provide physical cable protection and where standard, non-hazardous industrial environments do not require specialized safety approvals.

Operating on the eddy-current principle, this proximity probe continuously measures the static and dynamic gap between the probe tip and the target shaft. As part of a complete 3300 XL transducer system, it connects to a 3300 XL extension cable and a 330180 Proximitor sensor. This combination converts displacement measurements into a high-resolution analog voltage output. These continuous signals interface with Bently Nevada 3500 protection systems or equivalent machinery monitoring racks to track shaft runout, radial vibration, and axial position, helping operators prevent critical rotating machinery failures.

Features

• 8 mm tip diameter proximity probe optimized for non-contact eddy-current displacement measurements.
• Fully threaded 3/8-24 UNF-2A body configuration with a 1.1-inch overall case length.
• 0.0 inches of unthreaded length, allowing maximum thread engagement into thin-walled bearing housings.
• Integrated 2.0-meter (6.6 feet) standard coaxial cable with a miniature ClickLoc connector.
• Rugged stainless steel case and probe tip designed to withstand severe industrial environments.
• Unarmored cable construction suited for pre-existing conduit or protective routing tracks.
• Standard configuration without hazardous area approvals for cost-effective safe-zone implementation.

Applications

This proximity probe configuration is commonly deployed on critical rotating machinery across heavy industries, including:

• Shaft vibration and axial position measurement on industrial steam and gas turbines.
• Radial displacement and rotor position monitoring in high-pressure centrifugal pumps and compressors.
• Continuous condition monitoring on large electric motors, gearboxes, and cooling tower fans.
• Machinery protection and diagnostics in power generation, water treatment, chemical processing, and refining facilities.

Ordering Information

Technical Specifications

Installation Guidelines

To ensure precise signal transmission and prevent mechanical drift, observe the following installation procedures:

• Adjust the mechanical gap during installation until the transducer output matches the calibrated center of the linear range, typically -10 Vdc (approximately 1.27 mm or 50 mils) relative to the shaft.
• Provide a physical clearance around the probe tip of at least 3 times the probe diameter to avoid side-view interference from surrounding metal machinery components.
• Route the unarmored coaxial cable inside protective metal conduit to safeguard the insulation against mechanical damage and oil exposure.
• Maintain proper system grounding by terminating the extension cable shield strictly at the instrument ground point on the Proximitor sensor end.
• Ensure the probe lock nuts are tightened to the recommended torque specifications to prevent movement caused by machine vibration.