Description

The Bently Nevada 330101-00-53-10-02-00 is a high-precision 8 mm proximity probe belonging to the 3300 XL 8 mm Proximity Transducer System. Engineered for non-contacting machinery vibration and shaft position measurements, this specific configuration features a fully threaded 5.3-inch case with 3/8-24 UNF threads and no unthreaded section (0.0-inch unthreaded length). Designed without stainless steel armor, the probe is equipped with a 1.0-meter standard coaxial cable and a miniature coaxial ClickLoc connector. It does not carry hazardous area agency approvals, making it highly cost-effective and structurally optimized for standard industrial machine environments where probes are routed through protective conduit and deep housings.

This transducer operates on the eddy-current principle, generating a high-frequency electromagnetic field from the probe tip that interacts with any nearby conductive metal target (such as an AISI 4140 steel shaft). As the target moves relative to the probe tip, the Proximitor sensor translates this movement into an accurate, linear voltage output. This makes the system ideal for measuring dynamic radial vibration, static axial shaft position, and keyphasor reference speeds on high-speed turbines, compressors, and pumps.

Features

• 8 mm Probe Tip: Robust design optimized for high-accuracy non-contact eddy-current displacement measurements.
• Fully Threaded Body: Standard 3/8-24 UNF thread profile with 0.0 inches of unthreaded case length and 5.3 inches of overall case length.
• Unarmored Standard Cable: Lightweight, flexible 1.0-meter coaxial cable designed for standard routing pathways.
• Gold-Plated ClickLoc Connector: Low-loss, vibration-resistant miniature coaxial connector for reliable signal transmission to the extension cable.
• Viton O-Ring Seal: Built-in elastomer seal prevents process fluid and pressure leakage past the probe body.
• Industrial Durability: Operates reliably across a wide temperature range of -52 degC to +177 degC.

Applications

This long-case, unarmored proximity probe is ideal for a variety of critical rotating machinery protection applications, including:

• Deep Casing Installations: The 5.3-inch case length allows for deep bracket or bearing housing penetration in heavy industrial machinery.
• Steam and Gas Turbines: High-accuracy shaft displacement and thermal growth monitoring.
• Centrifugal Compressors: Tracking high-frequency radial vibration and thrust bearing wear.
• Power Generation: Continuous monitoring of critical generators and gearboxes.

Ordering Information

Technical Specifications

Installation Guidelines

To ensure proper performance and maintain accurate machinery protection metrics, adhere to these engineering guidelines:

• Thread Engagement: For 3/8-24 UNF probe bodies, do not exceed 0.563 inches (14.3 mm) of maximum thread engagement length during mounting.
• Probe Gap: Calibrate and gap the physical probe tip distance per the 3300 XL system specification, typically set to 1.27 mm (50 mils) to establish the midpoint of the linear range (approx. -10 Vdc bias).
• Cable Management: Protect the standard unarmored coaxial cable by routing it through dedicated industrial conduit. Ensure the minimum bend radius is maintained to prevent structural degradation or signal attenuation.
• Shielding and Grounding: Ensure the overall shield of the probe and extension cables is grounded only at the Proximitor sensor housing.
• Connector Handling: Hand-tighten the ClickLoc coaxial connectors. Do not use metal pliers or excessive torque, as this can degrade the gold contacts.