Product Overview

The 330980-70-00 is a high-performance signal conditioning unit within the Bently Nevada 3300 NSv (Narrow Side View) Transducer System. This Proximitor Sensor is specifically engineered for critical machinery with restricted installation clearances, such as small-bore centrifugal compressors and refrigeration units. It converts the radio frequency signal from a proximity probe into a linear voltage output, allowing for the precise measurement of radial vibration, axial thrust position, and phase reference (Keyphasor) signals. The NSv design is uniquely optimized to eliminate "side-loading" or magnetic interference from surrounding metal, which often compromises the accuracy of standard 8 mm sensors in tight spaces.

Technical Specifications and Performance

The 330980-70-00 Proximitor is factory-calibrated to ensure high-fidelity data acquisition for Turbine Supervisory Instrumentation (TSI) systems:

• System Calibration: Configured for a 5.0-meter total system length (70 option), ensuring seamless integration with 5m probes and extension cables.

• Scale Factor: Delivers a standard average scale factor of 7.87 V/mm (200 mV/mil) for precise resolution.

• Linear Range: Provides a 1.5 mm (60 mil) linear operating range, ideal for tracking shaft dynamic motion.

• Small Target Accuracy: Optimized for monitoring shafts with diameters as small as 51 mm (2.0 inches) or axial targets down to 15 mm (0.6 inches).

• Agency Approvals: Standard non-hazardous area version (00 option), suitable for general industrial environments.

Advanced Design and System Benefits

As a cornerstone of predictive maintenance programs, the 330980-70-00 offers several mechanical and electrical advantages:

• Enhanced RFI/EMI Immunity: Engineered to exceed European CE standards for electromagnetic compatibility, ensuring signal stability even when mounted near high-frequency noise sources.

• Backward Compatibility: Designed to replace legacy 3300 RAM, 3000-series 190, and 7000-series transducer systems, allowing for a simplified upgrade path to modern monitoring hardware.

• DIN Rail or Bulkhead Mounting: The robust, slim-profile housing supports high-density installation in compact control cabinets, utilizing SpringLoc terminal strips for vibration-resistant, tool-free field wiring.

• Hermetic Reliability: When paired with NSv probes, the system maintains high accuracy in the presence of turbine oils and process fluids common in power generation and petrochemical refining.

Operational Applications

This Proximitor sensor is a vital component for maintaining the health and safety of high-speed rotating assets, including:

• Centrifugal Air Compressors: Reliable vibration detection in tight machine housings.

• Aeroderivative Gas Turbines: High-accuracy monitoring in compact engine frames.

• Process Gas Equipment: Continuous axial position tracking to prevent catastrophic bearing failure.

• Diagnostic Analysis: Providing the clean, stable phase reference signals required for advanced rotor dynamic plotting and balancing.