Bently Nevada 330780-50-CN 3300 XL 11 mm Proximity Sensor Transducer System

The Bently Nevada 330780-50-CN 3300 XL 11 mm Proximity Sensor is a high-performance eddy current proximity transducer system designed for non-contact vibration and displacement monitoring of critical rotating machinery. Manufactured by Baker Hughes, this 3300 XL Proximitor sensor is an essential component for protecting turbines, compressors, and pumps in industries like power generation, oil and gas, and petrochemical refining .

Key Technical Specifications

The model 330780-50-CN features a total system length of 5.0 meters (16.4 feet) with a standard panel mount configuration . It operates within a frequency range of 0 to 8 kHz (or up to 10 kHz depending on configuration), making it suitable for both static (position) and dynamic (vibration) measurements .

Output Sensitivity: 3.94 V/mm (100 mV/mil) .

Linear Range: 4.0 mm (160 mils), starting from approximately 0.5 mm (20 mils) off the target surface .

Target Material: Factory calibrated to AISI 4140 steel for immediate out-of-the-box accuracy .

Approvals: The "-CN" suffix signifies multiple hazardous area approvals, including ATEX/IECEx and Chinese NEPSI, ensuring compliance with international safety standards for use in potentially explosive environments .

Advanced Features for Reliable Monitoring

The 3300 XL 11 mm system offers distinct advantages over standard 8 mm systems. The larger 11 mm probe tip provides an extended linear range, which is crucial for demanding applications such as axial (thrust) position measurement, differential expansion, and rod drop monitoring on reciprocating compressors .

Enhanced Immunity: The system features improved RFI/EMI immunity, protecting against interference from high-frequency radio signals and ensuring stable data acquisition without special installation requirements .

Robust Construction: The Proximitor sensor utilizes SpringLoc terminal strips for fast and secure field wiring without special tools. All system components feature gold-plated brass ClickLoc connectors that lock into place, preventing loosening due to vibration .

Durability: The probe is constructed with an AISI 304 stainless steel body and operates in extreme temperatures ranging from -40°C to +177°C (-40°F to +350°F) .

System Compatibility and Applications

This proximity transducer system is fully compatible with Bently Nevada 3500 monitoring systems and is designed to replace older 7200 series 11 mm and 14 mm systems .

Primary Applications Include:

Radial vibration and shaft position monitoring

Axial (thrust) position measurements

Keyphasor reference signals for phase and speed measurement

Tachometer and zero-speed determination 

Why Choose the 330780-50-CN?

The Bently Nevada 330780-50-CN ensures machinery protection by providing precise, real-time data to predictive maintenance programs. Its robust design, extended linear range, and international safety certifications make it the industry standard for ensuring operational reliability and reducing unplanned downtime in critical industrial processes .

For seamless integration with your existing asset condition monitoring systems, the 3300 XL 11 mm Proximitor delivers the accuracy and durability that Bently Nevada is trusted for worldwide.