The Bently Nevada 330904-00-25-05-02-05 is a specialized eddy current sensor from the 3300 NSv (Narrow Side-view) family. This transducer system measures radial vibration and axial position on machinery with limited installation clearance. It effectively addresses the challenges of small-bore housings where standard 8mm probes experience “side-view” interference. By utilizing a tighter magnetic field, the NSv probe provides accurate data even when positioned close to adjacent metal surfaces.
Structural Engineering and Durability
- Thread Size: 1/4-28 UNF
- Unthreaded Length: 0.0 inches
- Case Thread Length: 2.5 inches
- Total Cable Length: 0.5 meters (1.6 feet)
- Connector Type: Miniature coaxial ClickLoc with connector protector
- Agency Approvals: ATEX, IECEx, and CSA for hazardous locations
Primary Industrial Applications
The 3300 NSv system specifically targets small-scale rotating equipment. It is the primary choice for monitoring refrigeration compressors and high-speed process gas expanders. Because it accurately tracks shafts smaller than 50mm (2 inches), it provides critical protection for centrifugal pumps and auxiliary turbines. The sensor operates reliably in submerged oil environments and high-pressure casings common in TSI (Turbine Supervisory Instrumentation) applications.
System Compatibility
This probe is a direct replacement for legacy 3300 RAM (Rear Axial Mount) sensors. It offers full electrical and mechanical interchangeability while providing superior chemical resistance. The sensor works in tandem with a 3300 NSv Proximitor and extension cable to form a complete transducer system. This setup ensures a linear voltage output proportional to the distance between the probe tip and the observed target.
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