Description

The Bently Nevada 330101-33-66-10-02-05 is a high-precision, non-contact 8 mm proximity probe engineered for critical rotating machinery protection. Operating on the eddy-current principle, this transducer system measures dynamic vibration and static shaft position, making it a vital component for fluid-film bearing monitoring chains. Unlike generic configurations, this specific model features an unarmored standard cable layout with a 3.3-inch unthreaded length, a 6.6-inch overall case length, and a 1.0-meter (3.3-foot) total lead length. It is equipped with a miniature coaxial ClickLoc connector and is certified under standard CSA, ATEX, and IECEx agency approvals. Designed for permanent installation, this probe offers absolute compatibility with the 3300 XL series Proximitor sensors (such as the 330180 series) and interfaces directly with 3500 monitoring racks to protect high-speed machinery from damage.

Features

• Threaded Construction: 3/8-24 UNF-2A threaded stainless steel body, optimized for direct mounting into bearing housings or casings.
• Precise Clearances: Features a 3.3-inch unthreaded section combined with a 6.6-inch overall case length for tailored physical installations.
• Eddy-Current Sensing: Delivers continuous, high-accuracy non-contact measurements of displacement and shaft vibration.
• Standard ClickLoc Connector: Miniature gold-plated coaxial ClickLoc connector provides a secure, low-loss, and reliable connection.
• FEP Coaxial Cable: Standard unarmored coaxial cable jacketed in durable fluorinated ethylene propylene (FEP).
• Backward Compatibility: Fully interchangeable and backward compatible with standard non-XL Bently Nevada 3300 series 5 mm and 8 mm components.
• Hazardous Location Approvals: Certified for use in explosive environments with CSA, ATEX, and IECEx approvals.

Applications

This proximity probe is widely used for heavy industrial rotating machinery monitoring, including:

• Steam and Gas Turbines: Measuring radial vibration, rotor dynamic motion, and axial thrust position.
• Industrial Compressors and Pumps: Tracking shaft vibration and misalignment in high-speed, critical-duty applications.
• Generators and Gearboxes: Monitoring rotor clearances, shaft runout, and mechanical wear.
• Keyphasor Reference: Providing precise phase reference and rotational speed measurements for diagnostic systems.

Ordering Information

Technical Specifications

Installation Guidelines

To secure reliable operation and prevent sensor damage, keep the following practices in mind:

• Thread Limits: Ensure thread engagement in the machine housing does not exceed the industry-standard limit of 0.563 inches for 3/8-24 threads, preventing mechanical binding.
• Gap Setting: Calibrate the probe to the proper mechanical standoff distance matching the -9 Vdc bias target (typically 1.27 mm or 50 mils) using a calibrated digital voltmeter.
• Cable Routing: Secure and route the FEP cable with a support system. Avoid sharp bends and prevent contact with high-vibration surfaces or rotating parts.
• Shielding and Grounding: Connect and ground shields according to Bently Nevada standard installation diagram drawings to mitigate electromagnetic noise in vibration measurements.
• Connector Assembly: Only tighten ClickLoc coaxial connectors finger-tight. Do not use pliers or excessive force on the delicate gold-plated interface.

Compliance and Certifications

This probe configuration is certified to comply with the following international hazardous area standards:

• CSA: Approved for Class I, Division 1 and Zone hazardous areas.
• ATEX: Certified for Zone 0, Zone 1, and Zone 2 gas/dust installations (Ex ia, Ex ec, Ex nA).
• IECEx: Globally recognized safety certifications for explosive atmospheres.