Description

For reliable non-contact machinery displacement and shaft position monitoring, the Bently Nevada 330101-20-40-10-02-05 serves as a robust 8 mm proximity probe engineered for demanding rotating machine applications. Part of the trusted 3300 XL series, this specific configuration features a durable 3/8-24 UNF threaded steel body without protective armor. To meet specific mounting requirements, it is configured with a 2.0-inch unthreaded length and a 4.0-inch overall case length. The unit includes a standard 1.0-meter (3.3 feet) coaxial cable terminating in a Miniature coaxial ClickLoc connector. Certified with CSA, ATEX, and IECEx options, this transducer component is fully equipped for hazardous environments, making it ideal for integration into critical machinery protection systems.

Features

• Threaded Steel Casing: 3/8-24 UNF standard thread structure designed for direct insertion into machine casings or bearing blocks without outer armor.
• 2.0-Inch Unthreaded Section: Designed with a 2.0-inch unthreaded length (A: 20) and a 4.0-inch overall case length (B: 40) to guarantee proper clearance through thick casing walls.
• 1.0-Meter Cable Length: Features a high-integrity, standard 1.0-meter (3.3 feet) cable (C: 10) for immediate proximity chain connections.
• Miniature ClickLoc Connector: Equipped with a standard Miniature coaxial ClickLoc male connector (D: 02) to lock in secure, low-loss connections with extension cables.
• Hazardous Location Protection: Features world-recognized CSA, ATEX, and IECEx approvals (E: 05) for intrinsically safe installations.

Applications

This eddy-current proximity probe is used in heavy-duty machinery protection systems to track mechanical movement in critical industrial hardware, including:

• Steam turbine and gas turbine radial vibration and axial thrust measurements.
• Rotor displacement monitoring in high-pressure compressors, pumps, and fans.
• Shaft centerline tracking and relative vibration in fluid-film bearing housings.
• Condition monitoring and protection systems operating in explosive gas or dust environments.

Ordering Information

Technical Specifications

Installation Guidelines

To ensure high-precision eddy-current readings, implement the following steps during mounting:

• Verify the probe mounting gap matches system calibration, typically positioned at 1.27 mm (50 mils) representing the center of the linear range.
• Confirm that the 2.0-inch unthreaded portion clears any internal mounting brackets or sleeve ports completely to eliminate unwanted side-viewing interference.
• Route standard cables securely using appropriate industrial conduit, ensuring proper shielding and grounding to shield the high-frequency signal from electrical noise.
• Ensure the coaxial cable is not bent beyond its minimum allowable bend radius during routing and installation.

Compliance and Certifications

This specific configuration is certified for safe operation in explosive atmospheres globally:

• CSA: Certified for intrinsically safe and non-incendive installations in hazardous locations.
• ATEX: Complies with European standards for explosive gas environments.
• IECEx: Internationally certified for explosive atmosphere safety and reliability.