Bently Nevada 330902-05-20-10-02-05 3300 NSv Proximity Probes

Description

Option 05 (0.5 in unthreaded length) and Option 20 (2.0 in overall case length) specify this 3300 NSv proximity probe configuration with stainless steel armor — 330902-05-20-10-02-05.

This eddy-current sensor is part of the Bently Nevada 3300 XL NSv proximity transducer system, used for shaft vibration and axial position measurement on high-speed rotating machinery with limited target geometry. The probe features integrated stainless steel armor to shield the coaxial cable from physical damage, making it suitable for environments with potential mechanical abrasion. It operates in conjunction with a 330980 Proximitor sensor and a 330930 extension cable to produce a standard voltage output proportional to the gap between the probe tip and the target material.

Features

• Thread type: 1/4-28 UNF threaded case with stainless steel armor for physical protection.
• Unthreaded length: 0.5 inches (Option 05) to accommodate specific mounting configurations.
• Overall case length: 2.0 inches (Option 20) standard mount design.
• Total length: 1.0 meter (39 inches) (Option 10) integrated cable.
• Connector option: Miniature coaxial ClickLoc connector (Option 02) for standard cable termination.
• Agency approvals: Option 05 designates multiple hazardous area certifications including CSA, ATEX, and IECEx.
• Measurement technology: Non-contact eddy-current sensor with an Average Scale Factor of 7.87 V/mm (200 mV/mil).

Applications

• Small-bore machinery with restricted mounting space.
• Aeroderivative gas turbines.
• High-speed centrifugal compressors and expanders.
• Radial vibration and axial position monitoring in tight clearance areas.

Ordering Information

Technical Specifications

Installation Guidelines

• Avoid exceeding the maximum recommended case torque of 7.3 N m (65 in-lb) to prevent thread and casing damage.
• Maintain a minimum bend radius of 25.4 mm (1.0 in) for the armored cable during installation routing.
• Recommended gap setting is 1.0 mm (40 mils) for optimal positioning in the linear range.
• Maintain a minimum separation of 25 mm (1.0 in) between adjacent transducer tips to prevent electromagnetic cross-talk.
• Connectors must be protected or insulated to ensure moisture exclusion in high humidity environments.

Compliance and Certifications

• Intrinsically Safe (ia): Certified for Class I, Zone 0, Ex ia IIC T5...T1 Ga; Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III.
• Non-Incendive / Increased Safety (nA, ec): Certified for Class I, Zone 2, Ex nA IIC T5...T1 Gc; Class I, Division 2, Groups A, B, C, D.
• CE Mark: Complies with European Community Directives including EMC Directive 2014/30/EU and RoHS Directive 2011/65/EU.
• China RoHS: Environment Friendly Use Period (EFUP) of 15 years.
• Functional Safety: SIL 2 certified with Hardware Fault Tolerance (HFT) of 0, and SIL 3 with HFT of 1 when deployed in redundant configurations.