Features:
- Interface Between the 50 mm Probe, Extension Cable, and Signal Conditioning Electronics
- Combines Large Diameter Coil Technology with Extended Linear Range Measurement Capability
- Operates in Conjunction with the 3300 XL 50 mm Probe and Extension Cable Components
The 330878-51-00 operates as the Proximitor Sensor in the 3300 XL 50 mm Transducer System, providing reliable signal conditioning and processing for eddy current proximity measurements. It continuously converts impedance variations from the 50 mm probe into usable output signals and distributes this processed data through standard industrial interfaces to support steady state operation of monitoring systems. Seamless integration with machinery protection systems is standard with the 330878-51-00, and its extended linear range capability allows precise measurement of large axial movements in critical rotating equipment. The 330878-51-00 incorporates advanced design improvements over previous proximity sensor generations, including the longest linear range of 27.9 mm (1100 mils) within the eddy current transducer product line.
The 330878-51-00 provides essential measurement functions for differential expansion and rotor expansion monitoring applications, and is a critical component of the protection path, directly affecting the proper, normal operation of large steam turbine generator monitoring systems. One 330878-51-00 Proximitor Sensor is required per measurement channel, working in conjunction with a dedicated 50 mm probe and extension cable to form a complete transducer system. The 330878-51-00 occupies a standard mounting configuration with DIN rail installation capability and is typically located within equipment enclosures near the measurement point.
For Differential Expansion applications requiring extended range measurement, the 330878-51-00 system supports dual transducer configurations observing opposite sides of a collar. In addition to standard single transducer operation, the complementary input arrangement effectively doubles the measurable range from 27.9 mm to 56 mm (1.1 to 2.2 inches). The 330878-51-00 dual transducer configuration executes measurement using the extended linear range specified in the system specifications. Using this method, the redundant measurement system continually monitors the relative position between turbine rotor and machine stator. If the system detects that differential expansion exceeds normal operating parameters (outside configured tolerance levels based on thermal growth differentials), it will automatically generate alerts for machinery protection systems and place an event in the monitoring system event log.
The 330878-51-00 Bently Nevada 3300 XL 50 mm Proximitor Sensor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 330878-51-00 3300 XL 50 mm Proximitor Sensor Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Bently Nevada 330878-51-00 3300 XL 50 mm Proximitor Sensor Specs
General
- Manufacturer Bently Nevada
- Model 330878-51-00
- Condition New Original ready stock
- Product Family 330878-50-00,330878-51-05,330878-90-05
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Differential Expansion (DE): Measuring the difference in growth rates between a turbine rotor and its casing.
- Rotor Expansion (RX): Monitoring the axial growth of large steam turbine generator rotors.
- Harsh Environments: Specifically engineered for the extreme conditions inside large steam turbine generators.
- Retrofitting: Serving as a direct, high-performance replacement for older 7200 series 50 mm and 130713 DE transducer systems.
- Analog Operation: As an eddy current proximity sensor, the Proximitor Sensor is an analog device and does not typically utilize user-serviceable firmware or software updates in the way a digital controller would.
- Maintenance: Physical verification of the transducer system's operation is recommended during installation and periodically thereafter by simulating shaft motion.
- Field Notifications: While the sensor itself is not "updated," Bently Nevada may issue Field Notification Letters regarding system-wide improvements or technical advisories that can be found on the Baker Hughes Document Archives.
- Humidity: The sensor experiences less than a 3% change in Average Scale Factor (ASF) when tested according to IEC 68-2-66 standards.
- Moisture Resistance: The 50 mm probe features front and rear seals combined with High Temperature FluidLoc cable to prevent moisture ingress into the tip.