Bently Nevada 330908-10-55-05-02-00 3300 NSv Proximity Probe

Description

330908-10-55-05-02-00 specifies this 3300 NSv proximity probe configuration, which features a 3/8-24 UNF thread, a 1.0-inch unthreaded length (Option 10), and a 5.5-inch overall case length (Option 55) without protective armor. This non-contact transducer component is paired with a 0.5-meter (20-inch) coaxial cable (Option 05) terminated with a miniature coaxial ClickLoc connector (Option 02) without a connector protector, requiring no specific agency approvals (Option 00).

Unlike the armored 330909 variant designed for mechanical defense, this unarmored 330908 configuration is streamlined for tight installations such as process gas compressors or aeroderivative gas turbines. The ClickLoc connector provides a secure mechanical coupling to the extension cable, preventing loosening in environments subject to vibration, while the 3/8-24 UNF thread pattern simplifies direct threaded installation.

Features

• Option 10 designates a 1.0-inch (25.4 mm) unthreaded length, allowing specific stand-off adjustment in threaded mounting brackets.
• Option 55 defines a 5.5-inch (139.7 mm) overall case length for deep-reach installation configurations.
• Option 05 provides a 0.5-meter (20-inch) total probe length, optimized for short-run connections to an extension cable.
• Option 02 specifies a miniature coaxial ClickLoc connector on a standard coaxial cable without an integrated connector protector.
• Option 00 designates that agency approvals are not required, simplifying supply chains in non-hazardous industrial environments.
• Thread configuration utilizes a standard 3/8-24 UNF-2A thread pattern for mounting compatibility.
• Unarmored probe body design reduces physical envelope and eases routing through standard conduits.
• Polyphenylene sulfide (PPS) probe tip material and AISI 304 stainless steel case construction resist chemical degradation.

Applications

• Centrifugal air and refrigeration compressors.
• Process gas compressors with restricted access or small targets.
• Radial vibration and position measurements on shafts smaller than 51 mm (2 inches).
• Axial (thrust) position measurements on flat targets smaller than 15 mm (0.6 inches).
• Tachometer, speed, and phase reference (Keyphasor) applications with tight clearance limitations.

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Probe Gap: Mount the probe to establish a nominal gap of 1.0 mm (40 mils) from the target surface for calibrated mid-range operation.
• Case Torque: Tighten the probe case to a maximum recommended torque of 11.3 N m (100 in-lb). For the first three threads of the engagement, do not exceed 7.5 N m (66 in-lb) to prevent damage.
• Bend Radius: Ensure any bends in the 75 ohm FEP coaxial cable maintain a minimum bend radius of 25.4 mm (1.0 inch) to preserve electrical integrity.
• Connector Care: Hand-tighten the miniature coaxial ClickLoc connectors until they click into place. Use silicone tape or connector protectors to shield connections from moisture and fluids.

Compliance and Certifications

This specific configuration (Option 00) is designated for non-hazardous locations and does not carry regional explosion-proof certifications. The product series complies with European Community directives including EMC Directive 2014/30/EU (standards EN 61000-6-2 and EN 61000-6-4) and RoHS Directive 2011/65/EU.