Bently Nevada 81724-00-08-10-02 Non-Contacting Proximity Probe Assembly

Description

The 81724-00-08-10-02 is an industrial-grade, precision non-contacting proximity probe assembly manufactured by Bently Nevada for machine condition monitoring and asset protection. This high-integrity hardware transducer loop element operates on the eddy-current principle, generating a controlled radio-frequency field to track target behavior with micrometer-level resolution. The sensor dynamically reads displacement variations without physical mechanical contact, rendering immediate, high-fidelity data streams for tracking relative shaft vibration, fluid-film bearing oil clearance gaps, axial thrust position, and rotational speed variables on heavy-duty rotating machinery components.

The complete option string for the 81724-00-08-10-02 explicitly designates its physical structure and mechanical layout limits. This specific variant features a standard unthreaded smooth body design combined with a 3/8-24 UNF thread pattern configuration, an exact case length profile of 0.8 inches, an extended total loop cable length of 1.0 meter (approximately 3.3 feet), and a factory-fitted miniature coaxial connector end option. Built to withstand aggressive processing plant environments, the probe tip construction consists of high-stability polyphenylene sulfide (PPS) molded over a corrosion-resistant stainless steel main case, achieving a fully hermetic chemical and oil-splash barrier.

Features

• Rugged non-contacting eddy-current transducer architecture capturing high-speed shaft dynamics without wear.
• Premium stainless steel case material integrated with a hermetically sealed polyphenylene sulfide (PPS) sensor tip.
• Precise 3/8-24 UNF thread pattern configuration designed for clean insertion into localized bearing housings.
• Specialized factory-terminated miniature coaxial connector establishing low-loss coupling with extension cables.
• Robust internal winding compensation maintaining high linear scale factor stability across wide temperature bounds.
• Universal compatibility with matching proximity sensor conditioners and 3500 series protection racks.

Applications

• High-accuracy radial shaft vibration tracking and relative fluid-bearing position diagnostics on high-speed industrial fans.
• Continuous axial rotor position measurements and thrust displacement safety logging inside heavy-duty process pumps.
• High-integrity zero-speed tracking, tachometer signal acquisition, and Keyphasor phase reference indexing across balance-of-plant machinery skids.

Ordering Information

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Threaded Casing Mounting: Thread the probe assembly directly into the pre-drilled machine case port or bracket layout. Use a calibrated torque tool to secure the locknuts according to specified parameters to prevent thread stripping.
• Mechanical Probe Gap Adjustment: Use a digital voltmeter connected to the proximity signal conditioner block to monitor the output gap voltage while threading the body. Adjust until the specified static voltage bias (typically matching the midpoint of the linear scale) is locked in.
• Coaxial Connector Insulation: Thread the miniature coaxial terminal connection firmly onto the matching extension cable link. Apply specialized self-fusing insulation sleeves or connector protectors over the connection point to isolate the bare metal casing from structural machinery ground lines.
• Cable Routing Security: Route the integrated 1.0-meter trailing lead wire inside a dedicated flexible metal conduit run. Keep all proximity signal lines isolated from high-voltage AC motor power runs to eliminate capacitive electrical noise cross-talk.