Bently Nevada 330850-51-00 3300 XL 25 mm Proximitor Sensor Precision Machinery Protection

The Bently Nevada 330850-51-00 is a high-performance 3300 XL 25 mm Proximitor Sensor designed for continuous, non-contact measurement of differential expansion (DE) in critical rotating machinery . As a key component of the 3300 XL transducer system, this sensor works in tandem with a 25 mm proximity probe and extension cable to provide accurate, reliable data for protecting steam turbine generators and other large assets .

Key Features and Benefits

Superior Signal Integrity: The 330850-51-00 features improved RFI/EMI immunity, allowing it to achieve European CE mark approvals without special mounting considerations. This ensures the transducer system remains unaffected by nearby high-frequency radio signals, guaranteeing measurement accuracy in electrically noisy industrial environments .

Space-Saving Design: Its thin profile offers flexible installation options. The Proximitor can be mounted in high-density DIN-rail configurations to save panel space, or in traditional panel mount setups, adapting to your specific control cabinet requirements .

Robust and Reliable Construction: Housed in durable A380 aluminum, the sensor is built to withstand harsh conditions. It utilizes SpringLoc terminal strips that require no special installation tools, facilitating faster, highly secure field wiring connections and reducing installation time .

Seamless System Integration: This sensor is factory calibrated to work specifically with 3300 XL 25 mm proximity probes, outputting 0.787 V/mm (20 mV/mil) over a full linear range of 12.7 mm (500 mils) . Its output is identical to legacy 7200 and 25 mm DE Integral systems, allowing for straightforward upgrades without needing to change existing monitor configurations .

Technical Specifications (Typical)

Model Number: 330850-51-00 

System Length: 5.0 meters (compatible with 5m system components) 

Mounting: DIN-rail or Panel mount 

Output Resistance: 50 ohms 

Power Supply: -17.5 Vdc to -26 Vdc 

Applications

The primary application for the Bently Nevada 3300 XL 25 mm system is measuring Differential Expansion (DE) on mid-size to large steam turbine generators. It monitors the difference in thermal growth rates between the turbine rotor and the machine stator (casing), providing critical data to prevent internal rubbing and catastrophic failure .

Why Choose the 3300 XL Series?

The 3300 XL series represents the standard in modern machinery protection. By choosing the genuine Bently Nevada 330850-51-00, you are investing in proven technology that enhances machine uptime, reduces maintenance costs, and ensures the safety of your critical assets. Its robust design and advanced features make it the ideal choice for upgrading outdated systems or equipping new turbine installations.

For specific pricing, availability, or to place an order, please contact a qualified vibration instrumentation supplier.

Keywords: Bently Nevada 330850-51-00, 3300 XL Proximitor Sensor, 25 mm Proximitor, Differential Expansion sensor, Bently Nevada 3300 XL, machinery protection, turbine monitoring, DIN rail mount sensor, vibration monitoring, proximity transducer.