Bently Nevada 330101-23-34-10-02-05 3300 XL 8 mm Proximity Probe

Description

Option 23 (2.3 inches unthreaded) and Option 02 (ClickLoc coaxial connector, standard unarmored cable) specify this 3300 XL 8 mm probe configuration — 330101-23-34-10-02-05. This eddy-current probe operates within 3300 XL monitoring systems for non-contact shaft vibration and axial position measurement on industrial rotating machinery. This specific unarmored variant with standard cable provides physical connection of 1.0 meter (3.3 feet) to an extension cable and Proximitor sensor, certified for hazardous area deployment under CSA, ATEX, and IECEx approvals.

Operating under the eddy-current principle, the probe generates a high-frequency electromagnetic field that interacts with a conductive metal target, typically an AISI 4140 steel shaft. The system translates the distance between the probe tip and the target into an analog voltage signal of 7.87 V/mm (200 mV/mil). With its 3/8-24 UNF thread structure, this probe can be permanently mounted on bearing housings or machinery casings to monitor critical rotors in steam turbines, gas turbines, compressors, and pumps.

Features

• Option 23 unthreaded length: 2.3 inches (58 mm) unthreaded section for installation in deep mounting blocks.
• Option 34 case length: 3.4 inches (86 mm) overall 3/8-24 UNF threaded body length.
• Option 10 total length: 1.0 meter (3.3 feet) integrated probe cable length.
• Option 02 connector: Miniature coaxial ClickLoc connector with gold-plated brass contacts, standard cable insulation (no connector protector).
• Option 05 agency approval: Certified for hazardous area classifications by CSA, ATEX, and IECEx.
• 8 mm probe tip diameter supports standard 3300 XL proximity system measurement range of 2.0 mm (80 mils) [Traits].
• Stainless steel probe body and polyphenylene sulfide (PPS) tip construction [Traits].

Applications

• Steam turbine and gas turbine rotor shaft vibration measurement [Traits]
• Centrifugal compressor and pump shaft axial position monitoring [Traits]
• Thrust bearing wear and rotor displacement tracking [Traits]
• Industrial gearbox shaft vibration and dynamic motion analysis [Traits]
• Critical rotating machinery protection and machinery diagnostic systems [Traits]

Ordering Information

Technical Specifications

Installation Guidelines

Proper installation of the probe is critical for correct vibration measurements. Observe the following guidelines during installation:

• Thread Engagement: Maintain standard class matching for external probe threads. Do not exceed 0.563 inches (14.3 mm) of thread engagement to prevent binding.
• Probe Gap Setpoint: Adjust the physical gap between the probe tip and target shaft per calibration requirements (typically -10.0 Vdc, corresponding to approximately 1.27 mm or 50 mils gap).
• Cable Care: Tighten ClickLoc coaxial connectors finger tight only. Do not use pliers or other tools on gold contacts. Maintain the bend radius of the coaxial cable at no less than 25.4 mm (1.0 inch) to prevent damage.
• Shielding and Grounding: Maintain proper coaxial shield isolation from machine ground except at the designated grounding point at the Proximitor sensor terminal block [Traits].
• Mechanical Clearance: Maintain a minimum of 22.2 mm (0.875 inches) of clear space around the probe tip from surrounding metal to prevent side-loading calibration errors.

Compliance and Certifications

The 330101-23-34-10-02-05 probe is certified for use in industrial hazardous locations. Explicit certifications include:

• CSA/NRTL/C: Class I, Zone 0/1/2, Groups A, B, C, D; Class II, Groups E, F, G; Class III when installed per drawing 141092 or 140979.
• ATEX/IECEx: Ex ia IIC T5...T1 Ga; Ex ia IIIC T90 degC...T280 degC Dc; Ex nA IIC T5...T1 Gc; Ex ec IIC T5...T1 Gc.
• CE Mark: Complies with relevant European Union electromagnetic compatibility (EMC) directives [Traits].