Product Overview

The 330902-00-95-05-02-00 is a high-precision Narrow Side View (NSv) proximity probe from Bently Nevada, specifically engineered for machinery with severe spatial constraints. Unlike standard 8 mm probes, the NSv series is designed to function accurately in environments where side-view, counterbore, or rear-view clearances are extremely limited. This non-contacting eddy current sensor converts the distance between the probe tip and a conductive target into a linear voltage signal. It is a vital component for Turbine Supervisory Instrumentation (TSI), facilitating radial vibration and axial position monitoring on centrifugal compressors, refrigeration units, and small-bore process machinery.

Technical Configuration

The model number 330902-00-95-05-02-00 defines a specific mechanical and electrical hardware profile:

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

• Unthreaded Length: 0.0 inches (Fully threaded housing)

• Overall Case Length: 9.5 inches

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

• Connector Type: Miniature coaxial ClickLoc connector (02 option)

• Agency Approvals: Standard non-hazardous area (00 option)

• Linear Range: 1.5 mm (60 mils)

• Target Calibration: Standard AISI 4140 steel (factory calibrated)

Engineering for Restricted Spaces

The 3300 NSv series overcomes the physical and magnetic limitations of standard probes through specialized design features:

• Small Target Monitoring: Optimized for radial vibration measurement on shafts with diameters smaller than 51 mm (2 inches) or axial position monitoring on flat targets as small as 15 mm (0.6 inches).

• Side-View Interference Shielding: The probe tip is uniquely shielded to ignore surrounding conductive material, allowing for accurate data acquisition within tight counterbores or compact machine housings.

• Stainless Steel Armor: The FEP-insulated coaxial lead is encased in flexible 304 stainless steel armor, providing robust protection against mechanical abrasion, crushing, and fluid exposure within the machinery.

• Hermetic Reliability: Utilizing the patented TipLoc molding process, the probe tip is molecularly bonded to the stainless steel body to prevent oil and moisture wicking into the sensing coil.

Industrial Applications and System Integration

As a core element of machinery protection and diagnostic systems, this transducer offers:

• Comprehensive Monitoring: Ideal for measuring shaft dynamic motion in fluid-film bearings, thrust position, and Keyphasor phase reference signals.

• Total Interchangeability: Probes, extension cables, and 3300 NSv Proximitor sensors of the same system length (0.5m) are fully interchangeable without the need for manual bench calibration.

• Flexible Installation: Each probe includes silicone tape for connector sealing; however, Bently Nevada recommends connector protectors if the junction is directly exposed to turbine oil.

• Advanced RFI/EMI Immunity: Engineered to exceed CE mark standards for electromagnetic compatibility, ensuring stable signals in high-noise industrial environments.