Product Overview

The 330902-00-20-10-02-05 is a high-precision Narrow Side View (NSv) proximity transducer designed for specialized industrial monitoring where standard sensors cannot function. This eddy-current probe is specifically engineered for machinery with severe spatial restrictions, such as small shaft diameters (under 51 mm) or limited side-view clearance. By utilizing a 1/4-28 UNF threaded housing and integrated stainless steel armor, this sensor provides reliable non-contacting displacement measurements for radial vibration, axial thrust position, and Keyphasor signals on critical fluid-film bearing assets.

Technical Configuration

The alphanumeric designation 330902-00-20-10-02-05 indicates the following hardware specifications:

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

• Unthreaded Length: 0.0 inches (Fully threaded probe body)

• Overall Case Length: 2.0 inches

• Total System Length: 1.0 Meter (approx. 3.3 feet)

• Connection Type: Miniature coaxial ClickLoc connector

• Hazardous Area Approvals: Multi-certified including ATEX, IECEx, and CSA

• Linear Range: 1.5 mm (60 mils)

• Average Scale Factor: 7.87 V/mm (200 mV/mil) when used with compatible Proximitor

Specialized Engineering for Confined Spaces

The 3300 NSv system is optimized for environments where standard 8 mm probes would suffer from signal interference or physical fitment issues:

• Restricted Clearance Performance: The probe tip is designed to ignore surrounding conductive material, allowing for accurate measurements in small counterbores or tight machine housings.

• Small Target Precision: Specifically calibrated to monitor targets as small as 15 mm for axial position or shafts less than 51 mm for radial vibration.

• Mechanical Protection: The FEP-insulated coaxial cable is encased in flexible 304 stainless steel armor, protecting the signal path from abrasion, crushing, and accidental cutting during maintenance.

• Hermetic Sealing: Utilizing the patented TipLoc process, the probe tip is chemically bonded to the body to prevent the wicking of oil and moisture into the sensing coil.

  
  

Industrial Applications and Integration

The 330902-00-20-10-02-05 is an essential component for machinery health monitoring in the oil, gas, and power sectors:

• Asset Protection: Ideal for centrifugal compressors, high-speed pumps, and aeroderivative gas turbines.

  
  

• System Compliance: Fully compatible with Bently Nevada 3300 NSv Proximitor Sensors and standard 3500 Series machinery protection racks.

• Interchangeability: Probes of the same length and type can be swapped without manual recalibration, simplifying inventory management and field service.

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