Bently Nevada 330704-000-050-90-02-05 3300 XL 11 mm Proximity Probe

Description

330704-000-050-90-02-05: 3300 XL 11 mm proximity probe, M14 x 1.5 thread with stainless steel armor, Option 000 unthreaded length, Option 050 case length, Option 90 total length, Option 02 miniature coaxial ClickLoc connector, and Option 05 multiple agency approvals. This non-contact eddy-current displacement sensor operates within 3300 XL 11 mm monitoring chains to measure axial shaft position and dynamic vibration on fluid film bearing machinery.

This specific configuration is equipped with M14 x 1.5 metric casing protected by flexible AISI 302 stainless steel armor with an FEP outer jacket, offering enhanced mechanical protection in harsh industrial environments. Unlike unarmored or imperial-threaded models, this probe features a 50 mm case length with 0 mm of unthreaded length for solid mounting, coupled with a 9.0-meter total cable length. The 9.0-meter integrated triaxial cable connects directly to a 9-meter Proximitor sensor, eliminating the need for an intermediate extension cable and reducing overall connection points in turbine or compressor enclosures.

Features

• Option 000 provides a fully threaded M14 x 1.5 metric case with 0 mm unthreaded length for maximum mounting stability in thin-walled housings.
• Option 050 provides a 50 mm overall case length optimized for standard machine housings and tapped brackets.
• Option 90 provides a 9.0-meter (29.5 ft) total probe length, enabling direct connection to a 9-meter Proximitor sensor.
• Option 02 provides a miniature coaxial ClickLoc connector on standard triaxial FEP-insulated cable.
• Option 05 provides multiple approvals for hazardous locations, including ATEX, IECEx, and CSA certificates.
• AISI 302 stainless steel protective armor with FEP outer jacket protects the probe cable against physical impacts, abrasion, and oil ingress.
• Polyphenylene sulfide (PPS) probe tip offers durability and compatibility with industrial machinery lubricants.

Applications

• Steam turbine rotor axial (thrust) position and ramp differential expansion measurements.
• Radial shaft vibration and casing relative displacement monitoring in high-pressure turbocompressors.
• Rod position and rod drop monitoring in reciprocating compressors.
• Tachometer speed sensing and phase reference (Keyphasor) applications on large turbine generators.

Ordering Information

Technical Specifications

Installation Guidelines

• Ensure the probe tip has an unobstructed target area of at least 30.5 mm in diameter, ideally using AISI 4140 steel.
• Maintain the recommended gap of 2.5 mm (100 mils) to stay within the linear range of the transducer loop.
• Limit case mounting torque to 21.1 N-m (187 in-lb) and do not exceed the maximum rated limit of 63.3 N-m (560 in-lb) to avoid casing distortion.
• Maintain a minimum bend radius of 25.4 mm (1.0 in) along the armored cable run to prevent structural triaxial cable degradation.
• Protect coaxial connectors from machinery oil and chemical exposure; use proper connector protector boots or sleeves when inside machine casing.

Compliance and Certifications

• Intrinsically Safe (ATEX/IECEx): Ex ia IIC T5...T1 Ga, Ex ia IIIC T90C...T280C Dc; Class I, Zone 0, AEx/Ex ia IIC T5...T1 Ga; Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III.
• Non-sparking / Increased Safety: Ex nA/ec IIC T4/T5 Gc; Class I, Zone 2, AEx/Ex nA/ec IIC T4/T5 Gc; Class I, Division 2, Groups A, B, C, D.
• EMC Standards: EN 61000-6-2 (Immunity for Industrial Environments) and EN 61000-6-4 (Emissions for Industrial Environments).
• RoHS: Compliant with EU Directive 2011/65/EU and SJ/T 11364-2024.
• Functional Safety: Certified for SIL 2 (HFT=0) and SIL 3 (HFT=1) loops.