Description

Providing critical machinery protection, the Bently Nevada 330101-00-80-20-02-05 operates as a high-precision 8 mm proximity probe designed for non-contact shaft vibration and axial position measurements. As a core component of the 3300 XL 8 mm Proximity Transducer System, this probe utilizes eddy-current technology to deliver exceptionally accurate displacement tracking in demanding environments. This specific configuration features a fully threaded 8.0-inch case length with 0.0 inches of unthreaded length, making it ideal for deep-insertion flush-mount setups inside bearing housings and machinery casings where unthreaded standoffs are not required. Equipped with a standard 2.0-meter coaxial cable terminated in a miniature ClickLoc connector, this unarmored probe pairs seamlessly with 3300 XL extension cables and Proximitor sensors.

Unlike alternative variants in the same product line that feature protective armor or metric threads, this unarmored 3/8-24 UNF threaded configuration provides standard routing flexibility through narrow conduits and machine interiors. Certified with comprehensive CSA, ATEX, and IECEx hazardous area approvals (-05 option), this probe is engineered for continuous operation in explosive atmospheres, establishing it as an industry standard for monitoring steam turbines, gas turbines, compressors, pumps, and other high-speed rotating assets.

Features

• High-resolution 8 mm tip diameter optimized for non-contact eddy-current displacement and vibration tracking
• Fully threaded 8.0-inch stainless steel case (3/8-24 UNF-2A) provides robust structural mounting with zero unthreaded standoff
• 2.0-meter standard coaxial cable ensures stable, low-noise signal transmission for reliable diagnostics
• Miniature coaxial ClickLoc connector delivers a secure, low-loss electrical connection while simplifying install procedures
• Premium polyphenylene sulfide (PPS) tip molding protects probe coil from chemical degradation, moisture, and high temperatures
• Explosion-proof certification under CSA, ATEX, and IECEx standards for deployment in hazardous industrial zones
• Universal compatibility with Bently Nevada 3300 XL extension cables, 330180 series Proximitor sensors, and 3500 monitoring racks

Applications

This 3300 XL proximity probe configuration is designed for continuous machinery diagnostics and plant-wide asset protection across several industries, including power generation, oil and gas, and chemical processing. Common usage scenarios include:

• Radial shaft vibration monitoring on steam and gas turbines
• Axial thrust and shaft displacement tracking on high-pressure compressors
• Rotor movement and thermal expansion measurement in industrial pumps
• Shaft centerline tracking to diagnose sleeve bearing wear, misalignment, and instability
• Permanent vibration monitoring on critical rotating machinery operating in hazardous or explosive environments

Ordering Information

Technical Specifications

Installation Guidelines

Adherence to proper mechanical and electrical guidelines ensures optimal transducer signal and mechanical safety:

• Probe Gap: Mount with a physical gap that aligns with your specific calibration. The nominal recommended gap setting for radial vibration monitoring is approximately 1.27 mm (50 mils), which corresponds to a -9 Vdc output on a calibrated Proximitor sensor.
• Thread Engagement: The maximum thread engagement length for this 3/8-24 UNF threaded probe case is 0.563 inches (14.3 mm). Do not force past this depth to prevent binding or physical casing damage.
• Cable Routing: Ensure the 2.0-meter probe cable is routed safely through conduit, away from high-temperature areas and power cables that generate excessive electromagnetic noise. Maintain proper shielding and grounding practices.
• Connector Connection: Hand-tighten the gold coaxial ClickLoc connectors. When connecting with non-XL stainless steel coaxial fittings, secure them finger-tight plus an additional 1/8 turn using pliers. Do not over-torque.

Compliance and Certifications

Designed for continuous machinery diagnostics globally, this proximity probe conforms to the following standards:

• ATEX/IECEx: Intrinsically safe for use in Zone 0, Zone 1, and Zone 2 hazardous areas (Ex ia IIC T5...T1 Ga, Ex nA IIC T5...T1 Gc, Ex ec IIC T5...T1 Gc)
• CSA: Approved for Class I, Division 1 and 2, Groups A, B, C, and D hazardous atmospheres
• RoHS: Fully compliant with European environmental restriction of hazardous substances