Product Overview

The 330780-90-05 is a high-performance signal conditioning module for the Bently Nevada 3300 XL 11 mm Proximity Transducer System. This Proximitor sensor is specifically engineered to process signals from 11 mm non-contacting probes, converting displacement data into a linear voltage output. The 11 mm system is the industry standard for applications requiring a significantly wider linear measurement range than standard 8 mm sensors, such as axial thrust position monitoring on large steam turbines or radial vibration on hydroelectric generators. This specific unit is factory-calibrated for a 9.0-meter total system length, allowing for extended cabling distances between the machinery and the monitoring rack.

Technical Specifications and Capabilities

The 330780-90-05 delivers precision diagnostics for Turbine Supervisory Instrumentation (TSI):

• Linear Measurement Range: 4.0 mm (160 mils), nearly double the range of standard systems.

• Scale Factor: 3.94 V/mm (100 mV/mil), providing stable and accurate resolution for large-displacement monitoring.

• System Calibration: Configured for a 9.0-meter (29.5 ft) total loop length (90 option).

• Power Requirements: Designed for a nominal -24 Vdc input.

• Signal Stability: Advanced internal regulation ensures the output remains stable despite fluctuations in the input power supply.

• Hazardous Area Approvals: The -05 suffix indicates multi-agency certifications (ATEX, IECEx, CSA), enabling safe deployment in explosive or high-risk industrial atmospheres.

Advanced Engineering and Installation Design

The 3300 XL series incorporates several design innovations to streamline field deployment and improve longevity:

• Dual-Mounting Flexibility: The slim-profile housing supports high-density 35 mm DIN-rail mounting or traditional 4-hole panel mount configurations, ensuring backward compatibility with legacy 7200-series footprints.

• Electrical Isolation: The integrated mounting base provides inherent electrical isolation from the DIN rail or panel, eliminating the need for separate isolator plates and reducing installation complexity.

• RFI/EMI Shielding: Engineered with superior resistance to radio frequency and electromagnetic interference. It meets stringent European CE standards without the requirement for specialized shielded conduits or metallic enclosures.

• SpringLoc Terminals: Features vibration-resistant, tool-free terminal strips that ensure secure field wiring and prevent loose connections in high-vibration environments.

Industrial Applications

As a core component of Bently Nevada’s condition monitoring portfolio, the 11 mm Proximitor is essential for:

• Heavy Steam and Gas Turbines: Tracking axial displacement where large thermal expansion or rotor movement is expected.

• Hydroelectric Units: Monitoring radial shaft motion and centerline position on large-diameter vertical or horizontal shafts.

• High-Power Centrifugal Pumps: Detecting early-stage imbalances, misalignments, and bearing wear to prevent unplanned downtime.

• Predictive Maintenance: Seamlessly interfacing with Bently Nevada 3500 series racks to provide real-time asset health analytics.