Description

The Bently Nevada 330101-00-12-05-02-05 is a high-precision, non-contact 8 mm proximity probe configuration belonging to the industry-standard 3300 XL series. This specific model features a fully threaded 3/8-24 UNF housing with a 1.2-inch case length and 0.0-inch unthreaded length, allowing for maximum depth adjustment inside bearing housings or brackets where space is constrained. Outfitted with a short 0.5-meter (1.6-foot) total cable length and a standard miniature coaxial ClickLoc connector (without protector), this configuration is ideal for routing directly to machine-adjacent dry junction boxes. Certified with CSA, ATEX, and IECEx hazardous area approvals (Option 05), it is designed for critical, high-reliability machinery protection systems in petrochemical, power generation, and gas extraction industries.

Operating on the eddy-current measurement principle, the probe detects dynamic shaft vibration and static shaft displacement relative to the probe tip. It is fully compatible with standard 3300 XL Proximitor sensors (e.g., the 330180 series) and standard extension cables. When combined, they form an API 670 compliant transducer chain providing a highly stable, linear scale factor of 7.87 V/mm (200 mV/mil) for precise rotor dynamics monitoring.

Features

• 8 mm tip diameter optimized for non-contact eddy-current displacement measurements.
• Fully threaded 3/8-24 UNF-2A housing with no unthreaded portion (0.0 in unthreaded, 1.2 in overall case length).
• Short 0.5-meter (1.6-foot) total cable length, reducing slack and routing congestion inside machine casings.
• Miniature coaxial ClickLoc connector ensures a secure, positive-locking connection to the extension cable.
• Robust AISI 303 stainless steel probe body and polyphenylene sulfide (PPS) tip for maximum survival in hot, corrosive bearing environments.
• Equipped with CSA, ATEX, and IECEx agency approvals for safe operation in hazardous atmospheres.

Applications

• Radial vibration monitoring on steam turbines, gas turbines, and large industrial generators.
• Axial shaft displacement and thrust position monitoring in centrifugal compressors and high-pressure pumps.
• Rotor position tracking and expansion measurement on critical rotating assets.
• API 670 machinery protection loop configurations across power and petrochemical facilities.

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mounting and Gapping: Position the probe inside the bearing housing or mounting block. Set the physical gap to approximately 1.27 mm (50 mils), which corresponds to -9 Vdc output on the 3300 XL Proximitor sensor under calibrated conditions.
• Thread Engagement: Thread engagement should not exceed 14.3 mm (0.563 in). Exceeding this limit can cause physical binding or casing deformation.
• Cable Protection: Route the short 0.5-meter cable with a minimum bend radius of 25.4 mm (1.0 in). Avoid routing near high-temperature elements or sharp edges, and secure connections inside a moisture-resistant junction box.
• System Shielding: To minimize electrical noise interference, maintain continuous shield integrity across the probe-to-cable connection and ground the shield only at the monitoring rack end.