Bently Nevada 330101-48-71-20-02-05 3300 XL 8 mm Proximity Probe

Description

The Bently Nevada 330101-48-71-20-02-05 is a high-performance 8 mm proximity probe belonging to the industry-proven 3300 XL series. This specific configuration is engineered with a 4.8-inch unthreaded length, a 7.1-inch overall case length, and a 2.0-meter (6.6 feet) total length. The cable is a standard non-armored coaxial cable terminated with a miniature ClickLoc connector (without a connector protector), offering a streamlined and clean installation profile. Certified with the -05 agency approval option, this probe is fully compliant with ATEX, IECEx, and CSA standards, making it safe for permanent installation in hazardous area locations.

Designed for non-contact vibration and shaft position measurements, the 330101 series works on the eddy-current operating principle. It is built to survive in extreme machinery environments, featuring a robust, chemically-inert PPS (polyphenylene sulfide) tip and a corrosion-resistant stainless steel probe body. Operating as part of a 3300 XL monitoring chain, the probe must be paired with an appropriate 3300 XL extension cable and a 330180 series Proximitor sensor for precise gap-to-voltage conversion. The resulting dynamic voltage output is transmitted to the Bently Nevada 3500 monitoring rack or other industrial PLC and DCS systems to facilitate real-time machinery protection and diagnostic analysis.

Features

• Unarmored Design: Features a standard coaxial cable without metal armoring, maximizing routing flexibility in conduit or protective tray networks.
• ClickLoc Miniature Connector: Employs a secure, quick-connect miniature coaxial ClickLoc connector to ensure low electrical resistance and stable signal transmission.
• Rugged Material Construction: Designed with a high-strength PPS tip and a stainless steel case to resist moisture, oil, and chemical exposure on bearing housings.
• Hazardous Area Certified: Pre-approved with CSA, ATEX, and IECEx certifications for safe operation in explosive atmospheres.
• Non-Contact Measurement: Provides highly accurate, wear-free eddy current displacement monitoring of rotating machine components.

Applications

The Bently Nevada 330101-48-71-20-02-05 probe is used across heavy industries to monitor critical rotating assets. Typical deployment environments include:

• Steam turbine and gas turbine radial shaft vibration and axial thrust position monitoring.
• Compressor, expander, and turbine shaft vibration and casing relative displacement measurements.
• High-speed centrifugal pump and gear reducer shaft displacement and speed tracking.
• Hydroelectric generator shaft alignment and thermal expansion monitoring.
• Permanent machine protection systems requiring ATEX/IECEx/CSA hazardous area classifications.

Ordering Information

The 330101-48-71-20-02-05 represents a highly specific orderable configuration of the Bently Nevada 3300 XL 8 mm probe family. The breakdown below details each segment value of this unique SKU:

Technical Specifications

Installation Guidelines

To ensure proper operation and prolong the lifetime of the Bently Nevada 330101-48-71-20-02-05 probe, engineers should follow these essential field installation guidelines:

• Probe Gap Calibration: Mount the probe with the precise mechanical offset gap (typically 1.27 mm or 50 mils, corresponding to a nominal -10 VDC output from the Proximitor sensor) or as calibrated for the specific system.
• Case Torque Limit: Do not exceed the maximum recommended torque of 33.9 N-m (300 in-lb) when tightening the 3/8-24 UNF thread on stainless steel housings.
• Cable Minimum Bend Radius: Maintain a minimum cable bend radius of 25.4 mm (1.0 inch) during routing to prevent internal coaxial conductor damage.
• Shielding and Grounding: Ensure the probe cable shielding is continuous and properly isolated from ground loop contamination. Use appropriate terminal housings or junction boxes for outer connections.
• Moisture Protection: Apply self-fusing silicone tape or connector protectors if the connection to the extension cable is exposed to extreme moisture or liquid splashing.

Compliance and Certifications

This transducer probe configuration complies with major international safety standards for industrial electrical equipment and hazardous locations:

• ATEX: Certified for use in Zone 0, Zone 1, and Zone 2 explosive gas atmospheres when installed with proper intrinsic safety barriers.
• IECEx: Internationally certified for explosive atmospheres under intrinsic safety schemas.
• CSA: North American approval for Class I, Division 1 and Division 2 hazardous locations.