Description

Designed for precise non-contact shaft vibration and position measurement, the Bently Nevada 330101-24-35-10-02-00 is a specialized unarmored 8 mm proximity probe configuration within the 3300 XL product family. This specific model features a 3/8-24 UNF thread, a 2.4-inch unthreaded length, and a 3.5-inch overall case length, providing a 1.1-inch threaded section for fine adjustment during installation. It is supplied with a 1.0-meter (3.3 feet) standard unarmored coaxial cable terminated in a miniature ClickLoc coaxial connector, and does not require hazardous area agency certifications.

Operating on the eddy current principle, this transducer system measures static and dynamic distances between the probe tip and a conductive target, such as a machine shaft. It interfaces seamlessly with a 3300 XL Proximitor sensor and extension cable, functioning as a critical component in larger machinery protection chains (including the Bently Nevada 3500 rack). The unarmored design offers installation flexibility in applications where external conduits or dedicated cable trays already provide physical routing protection.

Features

• Eddy Current Measurement Principle: Delivers precise, non-contact displacement monitoring over a standard linear range.
• Configured Thread Profile: Standard 3/8-24 UNF-2A threads with a 3.5-inch case and 2.4-inch unthreaded portion to suit specific machinery housings.
• Unarmored Coaxial Cable: Uses a highly flexible, unarmored 75 ohm coaxial cable, ideal for routing through existing protective machine conduits or internals.
• ClickLoc Coaxial Connector: Features a gold-plated miniature coaxial ClickLoc connector for reliable signal transmission and easy connection without specialty tooling.
• Rugged Build Quality: Constructed with a polyphenylene sulfide (PPS) tip and a stainless steel body, ensuring resistance to aggressive lubricating oils and high-temperature environments.

Applications

The 330101 series probes are commonly deployed on rotating and reciprocating machinery across power generation, petrochemical, and manufacturing sectors. Typical application environments include:

• Radial vibration measurements of steam, gas, and hydro turbine shafts
• Thrust (axial displacement) position monitoring on high-pressure compressors and pumps
• Keyphasor (phase reference) and speed sensing on high-speed industrial rotors
• Casing alignment and bearing clearance assessments
• Continuous machinery protection in plants requiring high reliability and performance

Ordering Information

The Bently Nevada 330101-24-35-10-02-00 probe represents a specific combination of options defined in the manufacturer's Ordering Information. The detailed breakdown of this configuration is tabulated below:

Technical Specifications

Installation Guidelines

To ensure peak performance and mechanical integrity, adhere to the following installation guidelines:

• Target Alignment: Position the probe tip perpendicular to the observed shaft target area. The target area must be at least 3 times the diameter of the probe tip for a flat surface.
• Gap Setting: Mount the probe with the correct mechanical gap (typically configured around -10 VDC output from the matching Proximitor sensor) to keep the target within the linear measuring range.
• Cable Routing: Ensure the unarmored cable is routed through industrial conduit or secured with non-abrasive clips to prevent rubbing, wear, or noise pickup.
• Connector Integrity: Keep ClickLoc connectors clean, dry, and free of oil or grease. Do not over-torque or bend the cable near the connector junction.
• Bend Radius: Maintain a minimum cable bend radius of 25.4 mm (1.0 inch) during installation and routing.