Bently Nevada 330701-00-050-10-12-05 3300 XL 11 mm Proximity Probe

Description

Fully unthreaded 1/2-20 UNF steel probe body (Option 00) with a 5.0 in overall case length (Option 050) and 1.0 m total length (Option 10) defines the 330701-00-050-10-12-05, an unarmored 3300 XL 11 mm proximity probe equipped with a FluidLoc cable and multiple hazardous area approvals. This configuration is used for non-contacting vibration and displacement measurements on fluid film bearing machinery where a robust, unarmored 1/2-20 UNF threaded case is required.

The integrated FluidLoc cable prevents turbine oils and other system liquids from migrating through the interior of the coaxial cable into the surrounding enclosure or junction box. Featuring gold-plated brass ClickLoc connectors and a polyphenylene sulfide (PPS) tip, this probe is designed for long-term survival in harsh industrial environments. It operates within a standard 3300 XL 11 mm transducer system to produce a 3.94 V/mm (100 mV/mil) output when paired with a matching 3300 XL Proximitor sensor and extension cable.

Features

• Standard 1/2-20 UNF thread configuration without physical armor, ideal for standard industrial housings (base model 330701).
• 0.0 in unthreaded length (Option 00) maximizing case thread coverage for flexible depth adjustment.
• 5.0 in overall case length (Option 050) providing long-reach mounting capability in deep machine casings.
• 1.0 m total probe length (Option 10) designed to connect seamlessly to matching 3300 XL 11 mm extension cables.
• FluidLoc coaxial cable (Option 12) featuring a miniature ClickLoc connector, providing oil sealing throughout the cable interior.
• Multiple agency approvals (Option 05) supporting global hazardous area installation requirements under ATEX, IECEx, and CSA.

Applications

Typical applications include:

• Shaft axial (thrust) position monitoring on steam and gas turbines.
• Ramp differential expansion measurements in power generation turbine systems.
• Rod position or rod drop monitoring on reciprocating compressors.
• Tachometer, zero speed, and phase reference (Keyphasor) signal generation.

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

To establish correct physical and electrical alignment of the 11 mm proximity probe, follow these standard practices:

• Observe a recommended installation torque of 15.2 N-m (133 in-lb) to prevent distortion or thread binding of the unarmored 1/2-20 UNF casing.
• Maintain minimum clearance around the probe tip to prevent side-viewing interference with nearby housing surfaces or machine components.
• Ensure the coaxial ClickLoc connectors are completely free of dirt, moisture, and thread compounds prior to connection.
• Do not bend the FEP-insulated coaxial cable beyond its minimum rated bend radius of 25.4 mm (1.0 in) during routing.

Compliance and Certifications

Under Option 05, this assembly complies with the following safety and environmental standards:

• ATEX/IECEx: Intrinsically safe Ex ia IIC T5...T1 Ga; Ex ia IIIC T90degC...T280degC Dc; Non-sparking Ex nA IIC T5...T1 Gc; Ex ec IIC T5...T1 Gc.
• CSA/US: Class I, Zone 0: AEx/Ex ia IIC T5...T1 Ga; Class I, Div 1, Groups A, B, C, D; Class I, Zone 2: AEx/Ex ec IIC T4/T5 Gc; Class I, Div 2, Groups A, B, C, D.
• CE: Meets European Electromagnetic Compatibility and Safety Directives.
• RoHS: Compliant with restriction of hazardous substances directives.