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The 330103-00-03-90-12-05 is a highly engineered, reverse-mount eddy current proximity probe serving as a cornerstone component within the globally industry-standard 3300 XL 8 mm Proximity Transducer System. As a 9.0-meter integrated-cable version (-90), a complete functional loop for this specific configuration simplifies into two tightly integrated elements: the 330103 8 mm probe itself with its built-in 9.0-meter FluidLoc cable, and a matching 3300 XL 9-meter Proximitor Sensor, completely eliminating the need for an external extension cable.
9.0-Meter Integrated Direct Connection
Proprietary FluidLoc Cable Against Oil Migration
Reverse-Mount Configuration for Confined Spaces
The 3300 XL 8 mm system delivers the most advanced performance in eddy current proximity transducer technology. This 9-meter system configuration fully complies with the American Petroleum Institute’s (API) 670 Standard for mechanical configuration, linear range, accuracy, and temperature stability under harsh industrial conditions.
All 3300 XL 8 mm proximity transducer systems provide this level of high performance and support complete interchangeability of probes and Proximitor sensors, eliminating the need to match or bench calibrate individual components. Each 3300 XL 8 mm Transducer System component is backward compatible and interchangeable with other non-XL 3300 series 5 mm and 8 mm transducer system components. This extensive compatibility includes the 3300 5 mm probe, providing ideal engineering flexibility for legacy applications in which an 8 mm probe tip is too large for the available bearing housing mounting space.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 330103-00-03-90-12-05 Proximity Probe Manuals, Datasheets, Drivers, 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.
Oil & Gas Refining
In refineries, this reverse-mount probe monitors shaft vibration and axial displacement of large centrifugal compressors in crude distillation and catalytic cracking units, preventing rotor-to-bearing interference.
Petrochemical Processing
Applied in high-pressure, heavy-duty extruders and recycle gas compressors within ethylene cracking, polyethylene (PE), and polypropylene (PP) plants to provide continuous asset health monitoring and avoid unplanned downtime.
Thermal Power Generation
Installed in pairs on fluid-film bearings of large steam turbines, gas turbines, and main generators to precisely measure the relative dynamic motion of the shaft journal within the oil film.
Nuclear Power Generation
In the conventional island of nuclear power plants, it monitors the shafting status of main feedwater pumps and large turbine-generator sets, ensuring high-grade safety interlocking control and protection.
Hydroelectric Power Generation
Installed on large vertical or horizontal thrust bearings of hydro-generator units to monitor axial displacement, shaft runout, and variations in oil-film clearance.
Iron & Steel Metallurgy
Deployed in blast furnace blowers, Top Gas Recovery Turbine (TRT) systems, and heavy-duty drive gearboxes of hot rolling mills to achieve highly reliable mechanical fault early warnings.
When deploying the 330103-00-03-90-12-05 probe, the initial gap voltage must be strictly calibrated (typically to -10 V DC) by carefully adjusting its reverse-mount positioning. Sharp bends or pinching along its 9.0-meter integrated cable must be strictly avoided, and the connectors require proper insulation as well as oil-and-waterproofing protection. Furthermore, because this probe features a 9.0-meter unarmored total length, it must be connected directly to a dedicated 9-meter Proximitor sensor; adding any extra extension cable is strictly prohibited as it will severely compromise system calibration and sensitivity.
The 330103-00-03-90-12-05 proximity probe operates as a core component of the transducer system to provide an output voltage that is directly proportional to the distance between the probe tip and the observed conductive surface. It is engineered to measure both static (axial position) and dynamic (radial vibration) values. The system’s primary applications include continuous vibration and position monitoring on fluid-film bearing machines, as well as providing Keyphasor timing references and RPM speed measurements for critical machinery diagnostics.
The 330103-00-03-90-12-05 is a 3300 XL series 8 mm eddy current proximity probe from Bently Nevada. It is a non-contacting sensor used to measure the vibration and position of a rotating machinery shaft.
What is the core working principle of the 330103-00-03-90-12-05?
It generates a high-frequency electromagnetic field at the probe tip. When a metallic shaft approaches, it creates eddy currents, causing the system's Proximitor to output a voltage directly proportional to the distance between the tip and the metal surface.
How do you use a reverse-mount product like the 330103-00-03-90-12-05?
This type of probe is typically screwed through a dedicated reverse-mount sleeve or bracket from the outside of the machine casing toward the observed shaft, commonly used in bearing housings with restricted internal mounting space.
Does the 330103-00-03-90-12-05 measure static or dynamic values?
It can measure both. Static measurement is used for tracking axial displacement (position/differential expansion), while dynamic measurement tracks high-frequency radial shaft vibration.
Can the 330103-00-03-90-12-05 also be used for speed measurement?
Yes. It is frequently deployed as a Keyphasor sensor to detect a keyway on the shaft, providing a once-per-turn pulse signal used for speed measurement and phase analysis.
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