Bently Nevada 330780-51-00 3300 XL 11 mm Proximity Sensor Transducer System

Bently Nevada 330780-51-00 Proximitor Sensor: Precision Vibration Monitoring for 3300 XL 11 mm Systems

The Bently Nevada 330780-51-00 is a critical component of the renowned 3300 XL 11 mm Proximity Transducer System. Manufactured by Bently Nevada (a Baker Hughes business), this Proximitor Sensor is designed to provide high-accuracy, non-contact measurements of shaft vibration and axial position in critical rotating machinery . As the interface between the physical probe and the monitoring system, the 330780-51-00 converts mechanical movement into a useable voltage signal, making it indispensable for predictive maintenance and machine protection strategies in industrial environments .

Key Product Information

Part Number: 330780-51-00

Brand: Bently Nevada

Series: 3300 XL 11 mm

Product Type: Proximitor Sensor (Proximity Transducer System)

Mounting Type: DIN Rail Mount

System Length: 5.0 meters (16.4 feet) 

Weight: 0.255 kg (9 oz) 

Technical Specifications

The 330780-51-00 is engineered for reliability and precision. It receives signals from a 3300 XL 11 mm probe and extension cable, processing them to monitor machinery health.

Sensitivity: 3.94 V/mm (100 mV/mil) 

Linear Range: 4.0 mm (0.5 to 4.5 mm from target) 

Frequency Response: 0 to 8 kHz (capable of static displacement to dynamic vibration) 

Supply Voltage: -17.5 Vdc to -26 Vdc (without barriers); -23 Vdc to -26 Vdc (with barriers) 

Output Resistance: 50 Ω 

Operating Temperature: -35°C to +85°C (-31°F to +185°F) 

Housing Material: A380 Aluminum for durability and electrical robustness 

Distinctive Features

1. Industrial-Grade Electrical Isolation

The 330780-51-00 is designed to eliminate grounding issues. Its mounting base provides electrical isolation, which removes the need for separate isolation plates and simplifies installation while protecting against ground loop interference .

2. Easy DIN Rail Mounting

Unlike panel-mounted variants, the "-51-00" suffix specifically designates this model for DIN rail mounting . This allows for faster, more organized installation in control cabinets, utilizing spring-loaded terminal blocks that ensure secure wiring without special tools .

3. Superior Signal Integrity

This Proximitor is built with gold-plated connectors to ensure superior signal transmission and minimal noise interference. It also features high RFI/EMI immunity, meeting CE mark standards and eliminating the need for special shielding conduit .

4. Extended Linear Range

The 11 mm tip diameter provides a longer linear range (4.0 mm) compared to standard 8 mm systems. This allows for accurate measurements in larger machinery where shaft excursions are greater, making it ideal for fluid-film bearing machines .

Applications and Use Cases

The Bently Nevada 330780-51-00 is essential for monitoring the health of rotating assets where uptime is critical. Typical applications include:

Radial Vibration Monitoring: Measuring shaft vibration in turbines, compressors, and pumps .

Axial (Thrust) Position: Monitoring shaft displacement to prevent thrust bearing failure .

Keyphasor Measurement: Providing a once-per-turn reference signal for speed and phase analysis .

Differential Expansion: Measuring the expansion between the rotor and casing in large steam turbines.

Industries that commonly utilize this sensor include power generation, oil and gas refineries, chemical processing plants, and steel manufacturing .

System Compatibility

The 330780-51-00 is part of a modular system and must be used with matching 3300 XL components:

Probes: 330700 series 11 mm probes (e.g., 330703-000-060-10-02-00) .

Extension Cables: 330730 series cables (e.g., 330730-040-00-00) .

Monitors: Compatible with Bently Nevada 3500/42M, 3500/45, and other monitoring modules .

The Bently Nevada 330780-51-00 Proximitor Sensor offers the precision and durability required for modern condition monitoring. With its robust A380 aluminum housing, RFI immunity, and DIN rail mounting convenience, it ensures reliable data collection for your most critical turbomachinery. Whether you are upgrading a monitoring system or performing routine maintenance, this 3300 XL series sensor provides the accuracy needed to detect machine faults before they lead to unplanned downtime .