Product Overview

The 330902-00-38-05-02-05 is a specialized eddy current proximity transducer belonging to the Bently Nevada 3300 NSv (Narrow Side View) series. This system is specifically engineered for machinery where standard 8 mm probes are physically too large or where the conductive material surrounding the probe tip interferes with the magnetic field. It provides high-precision, non-contacting displacement measurements for radial vibration and axial position monitoring. This specific configuration features a 1/4-28 UNF thread and integrated stainless steel armor, making it the primary choice for centrifugal compressors and high-speed pumps with severe spatial restrictions.

Technical Configuration

The specific alphanumeric string 330902-00-38-05-02-05 defines the following mechanical and electrical profile:

• Model Identification: 330902 (1/4-28 UNF Thread with Stainless Steel Armor)

• Unthreaded Length: 0.0 inches (Fully threaded body)

• Overall Case Length: 3.8 inches

• Total System Length: 0.5 Meters (approx. 1.6 feet)

• Connection Interface: Miniature coaxial ClickLoc connector (02 option)

• Agency Approvals: Multiple international certifications including ATEX, IECEx, and CSA (05 option)

• Scale Factor: 7.87 V/mm (200 mV/mil) when paired with 3300 NSv Proximitor

• Target Calibration: Factory-set for AISI 4140 steel

Core Engineering Characteristics

The 3300 NSv series is designed to overcome the "side-view" limitations of standard sensors:

• Restricted Clearance Optimization: The NSv probe tip is uniquely shielded to minimize the effects of adjacent metal, allowing it to be installed in small counterbores or on shafts with diameters as small as 50 mm (2 inches).

• Flexible Stainless Steel Armor: The coaxial lead is encased in a protective 304 stainless steel sleeve, shielding the internal FEP insulation from mechanical abrasion, fluid exposure, and accidental severing during machine assembly.

• TipLoc and CableLoc Integration: These proprietary manufacturing processes ensure a vacuum-tight bond between the PPS tip and the probe body, while providing up to 330 N (75 lbf) of pull strength to the cable junction.

• ClickLoc Connectivity: The gold-plated miniature coaxial connector features a locking mechanism that prevents unintended disconnection under high vibration, ensuring continuous signal integrity for critical safety systems.

Industrial Applications and Compliance

The 330902-00-38-05-02-05 is a vital component for machinery health monitoring in the oil, gas, and power generation sectors:

• Turbine Supervisory Instrumentation (TSI): Ideal for monitoring shaft motion in fluid-film bearings where radial clearances are minimal.

• Hazardous Environment Rating: Fully certified for use in Zone 0, 1, and 2 explosive atmospheres.

• Backward Compatibility: Electrically compatible with legacy 3300 and 7200 series 5 mm proximity systems, allowing for seamless modernizations without significant mechanical rework.

• Asset Protection: Reduces unexpected downtime by providing early warning of thrust bearing wear and rotor imbalance in centrifugal compressors and process gas equipment.