Bently Nevada 330708-00-20-10-12-00 3300 XL 11 mm Proximity Probe

Description

Option 00 (0.0 in unthreaded length) and Option 12 (Miniature coaxial ClickLoc connector, FluidLoc cable) specify this armored 3300 XL 11 mm Proximity Probe configuration — 330708-00-20-10-12-00.

This 5/8-18 UNF-threaded eddy-current probe is used in 3300 XL 11 mm proximity transducer systems for non-contacting vibration and displacement measurements on fluid-film bearing machinery. Featuring a larger 11 mm tip diameter, this sensor operates over an extended linear range compared to standard 8 mm systems, rendering it suitable for long-stroke applications such as steam turbine ramp differential expansion and rotor position tracking. This variant is equipped with integrated stainless steel armor to shield the 75-ohm triaxial lead against severe environmental and physical hazards, and uses a FluidLoc cable to prevent fluid migration along the cable interior.

In contrast to sibling standard-mount probes such as the 330707, which is unarmored, or the 330701, which uses smaller 1/2-20 UNF threads, this configuration is specific to a 5/8-18 UNF housing with a 2.0-inch overall case length (Option 20) and a 1.0-meter total cable length (Option 10). It is terminated with a miniature coaxial ClickLoc connector and is designed to operate without regional or hazardous area approvals (Option 00), routing directly to a compatible 3300 XL 11 mm Proximitor sensor.

Features

• Option 00 fully threaded design delivers 0.0 inches of unthreaded length for flush-mount or close-tolerance ports.
• Option 20 establishes a 2.0-inch overall case length to fit standardized mechanical housings.
• Option 10 total length provides 1.0 meter (3.3 feet) of integrated triaxial cable.
• Option 12 features a miniature coaxial ClickLoc connector and FluidLoc cable to block interior fluid ingress.
• Integrated AISI 302 stainless steel armor protects standard cabling from mechanical abrasion and cuts.
• Polyphenylene sulfide (PPS) probe tip material withstands extreme process conditions and chemical exposure.
• AISI 304 stainless steel case construction offers structural stability.

Applications

• Ramp differential expansion measurements on industrial steam turbines
• Axial (thrust) shaft position measurements on critical rotating machinery
• Rotor dynamic vibration monitoring on fluid-film bearing assemblies
• Tachometer, zero-speed, and phase reference (Keyphasor) signal capture
• Rod position or rod drop tracking in reciprocating compressors

Ordering Information

Technical Specifications

Installation Guidelines

Maintain hand-tight status initially during thread engagement to avoid cross-threading. Secure the probe case utilizing the recommended torque of 15.2 N-m (133 in-lb), and do not exceed the maximum rated torque limit of 45.2 N-m (400 in-lb). Ensure that the maximum thread engagement does not exceed 0.938 inches inside the mounting port to prevent binding. Route the armored FEP cable with a bend radius of no less than 25.4 mm (1.0 in) to prevent internal physical damage. While the FluidLoc design prevents interior moisture migration, standard field-sealing procedures must be followed for external connector protection.

Compliance and Certifications

• Electromagnetic Compatibility (EMC): Compliant with EMC Directive 2014/30/EU via EN 61000-6-2 (Immunity) and EN 61000-6-4 (Emissions).
• RoHS: Compliant with European Community Directive 2011/65/EU.