Description

The Bently Nevada 330101-00-28-20-02-05 is a high-performance 8 mm proximity probe engineered as a primary component of the industry-standard 3300 XL 8 mm Proximity Transducer System. This specific model is configured with a 3/8-24 UNF thread, a 0.0-inch unthreaded length, and a 2.8-inch overall case length without physical armor. It is equipped with a 2.0-meter (6.6 feet) standard coaxial cable terminated in a premium gold-plated ClickLoc miniature connector. Designed for non-contact machinery dynamic vibration and position measurements, it carries the 05 agency approval option, enabling safe deployment in hazardous environments globally.

Unlike shorter or armored variations, this configuration offers a long-reach 2.8-inch case without unthreaded protrusion, making it highly suited for direct-mount installation inside thick bearing housings or machine casings. Working on the eddy-current operating principle, it delivers sub-micron resolution displacement data when paired with a compatible 3300 XL Proximitor sensor and extension cable, ensuring reliable machinery protection and early fault detection.

Features

• Unarmored Design: Features a standard unarmored coaxial cable, optimal for routing through protective conduits or clean machinery casings.
• Custom Geometry: Configured with a 0.0 in unthreaded length and a 2.8 in overall case length for precise mechanical fit-up.
• Gold-Plated ClickLoc Connection: Equipped with a miniature coaxial ClickLoc connector to maintain superior electrical contact and dynamic signal integrity.
• Extreme Environment Tolerance: Constructed with a PPS (Polyphenylene Sulfide) tip and stainless steel case to resist chemical attack and degradation.
• High Accuracy: Utilizes non-contact eddy-current principles to measure dynamic vibration and shaft position with high precision.

Applications

• Radial dynamic vibration and rotor axial displacement monitoring in utility-grade steam and gas turbines.
• Shaft centerline tracking and absolute casing expansion measurement on reciprocating and centrifugal compressors.
• Thrust position and mechanical runout analysis in high-speed industrial pumps and gearboxes.
• Permanent monitoring of critical assets in heavy industry sectors, including oil and gas, petrochemicals, and power generation.

Ordering Information

Technical Specifications

Connections and Interfaces

The probe utilizes an integrated 2.0-meter coaxial cable terminating in a high-grade, gold-plated ClickLoc miniature connector. This connection locks securely in place when hand-tightened onto a matching 3300 XL extension cable, ensuring a robust RF path free from high-frequency attenuation or mechanical degradation.

Installation Guidelines

• Verify that the mounting tap is properly tapped to a 3/8-24 UNF thread specification and is clear of debris.
• Ensure the probe gap is calibrated to the appropriate static distance (typically 1.27 mm or 50 mils) corresponding to system linear voltage limits.
• Maintain a maximum thread engagement length of 0.563 inches inside the machine casing to prevent binding.
• Protect standard unarmored cabling by routing through dedicated industrial conduits or conduit bodies in high-debris zones.
• Hand-tighten the coaxial ClickLoc connectors; do not use heavy pliers on the gold surface interfaces to prevent damage to the locking clip mechanism.

Compliance and Certifications

• Hazardous Area Approvals (Option 05): Certified by CSA, ATEX, and IECEx for deployment in global explosive environments.
• Intrinsically Safe (ia): Class I, Zone 0: AEx/Ex ia IIC T4/T5 Ga; Class I, Groups A, B, C, and D; Class II, Groups E, F, and G; Class III.
• Non-Sparking / Increased Safety (nA, ec): Class I, Zone 2: AEx/Ex nA IIC T5...T1 Gc; Class I, Division 2, Groups A, B, C, and D.
• Functional Safety: SIL 2 certified (HFT = 0) and SIL 3 capable (HFT = 1) for safety instrumented loops.
• Electromagnetic Compatibility: Compliant with European EMC Directive 2014/30/EU (EN 61000-6-2 and EN 61000-6-4).
• RoHS: Compliant with European RoHS Directive 2011/65/EU and China RoHS standards.