Description

The Bently Nevada 330101-00-78-15-02-05 is a high-performance, non-contact 8 mm proximity probe designed for the precise measurement of radial vibration and shaft position on critical industrial rotating machinery. As a key constituent of the 3300 XL series machinery protection chain, this specific configuration features a 3/8-24 UNF thread, a fully threaded 7.8-inch case length (0.0 inches unthreaded), and a 1.5-meter (4.9-foot) standard coaxial cable terminating in a miniature coaxial ClickLoc connector. This variant is ordered with option code 02, specifying a standard coaxial cable without an integrated connector protector, and option code 05, certifying it with CSA, ATEX, and IECEx approvals for hazardous industrial environments. Engineered to replace traditional contact sensors, this probe operates on the eddy-current principle to track micro-level shaft displacements under extreme operating conditions.

Features

• Non-contact eddy-current sensing technology provides wear-free machinery displacement monitoring.
• Robust 3/8-24 UNF threaded stainless steel housing with a fully threaded 7.8-inch case design.
• Standard 1.5-meter (4.9-foot) coaxial cable for compact monitoring chains.
• Miniature coaxial ClickLoc connector provides secure electrical connection to extension cables.
• Polyphenylene sulfide (PPS) probe tip is highly resistant to chemical exposure and degradation.
• Viton O-ring provides a durable pressure seal between the probe tip and case.
• Triple hazardous area approvals (CSA, ATEX, IECEx) certified for deployment in explosive environments.

Applications

This proximity probe is optimized for continuous machinery protection and diagnostic monitoring on critical rotating assets including:

• Radial vibration and dynamic motion analysis on high-speed steam and gas turbine shafts [MODEL TRAITS].
• Axial thrust position and casing thermal growth tracking in process compressors [MODEL TRAITS].
• Rotor displacement and shaft dynamic measurement in high-pressure industrial pumps [MODEL TRAITS].
• Over-speed and phase reference (Keyphasor) monitoring on generators, motors, and gearboxes.

Ordering Information

Technical Specifications

Installation Guidelines

To ensure precise transducer measurement and system calibration, follow these standard practices:

• Mount the probe with the recommended gap setting of -9 Vdc or approximately 1.27 mm (50 mils) from the target surface for standard radial vibration monitoring.
• Ensure proper cabling practices by routing probe extension cables with adequate shielding and grounding to prevent electromagnetic interference.
• Verify that the maximum thread engagement length does not exceed 0.563 inches (14.3 mm) to avoid binding during installation.
• Connect the gold ClickLoc coaxial connector finger-tight only. Do not use tools or pliers which could damage the miniature connector.
• Avoid exposing the probe tip to liquids and chemical solutions with extreme high or low pH, as this can erode the polyphenylene sulfide assembly and cause pressure seal failure.

Compliance and Certifications

The probe is certified under option code 05 to meet safety requirements in explosive environments:

• CSA: Approved for hazardous areas as an intrinsically safe or non-incendive device when properly wired with galvanic barriers.
• ATEX: Certified under European standards for gas and dust explosive atmospheres.
• IECEx: Internationally certified for explosive gas, vapor, and mist atmospheres.