Introduction
The EPRO 330105-02-12-05-12-05 is a specific configuration of an 11 mm Eddy Current Proximity Probe from the EPRO (Baker Hughes) machinery condition monitoring system. This sensor is designed for non-contact measurement of relative vibration and positional changes of rotating shafts, particularly in applications requiring a larger probe size for heavy-duty machinery or specific mounting requirements.
Operating on the eddy current principle, the probe generates an electromagnetic field at its tip. When this field interacts with a conductive target (such as a machine shaft), eddy currents are induced. The sensor measures the change in the field's strength to precisely determine the distance to the target, allowing it to monitor both dynamic motion (vibration) and static position. This specific variant features an 11 mm diameter, 2-meter integrated cable, and a 2 mm linear range, making it suitable for heavy industrial applications.
Parameters / Specifications
The key technical specifications for the EPRO 330105-02-12-05-12-05 are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 330105-02-12-05-12-05 |
| Product Line / Type | EPRO (Baker Hughes) 11 mm Eddy Current Proximity Probe |
| Probe Diameter | 11 mm |
| Thread Size | M14 x 1.5 |
| Sensitivity | -8.0 V/mm (± 5%) |
| Linear Range | 2.0 mm (This is a key interpretation of the -12 suffix in the middle of the part number) |
| Operating Temperature | -35°C to +150°C (-31°F to +302°F) for probe; -35°C to +120°C for cable |
| Power Supply | Provided by the connected proximitor (e.g., -24 V DC from PR 6426) |
| Output Signal | A modulated RF signal requiring a dedicated proximitor for demodulation |
| Cable Length | 2.0 meters (This is a key interpretation of the -12 suffix at the beginning of the part number) |
| Connector | Integrated, unconnectorized cable (This is a key interpretation of the -02 suffix) |
| Mounting Thread | M14x1.5 (This is a key interpretation of the -05 suffix at the end) |
| Dimensions (Probe) | Body Diameter: 11 mm; Thread: M14 x 1.5; Length is application-specific |
| Weight (Probe only) | Approx. 0.22 lbs (0.10 kg) |
Note: This sensor must be used with a compatible proximitor (e.g., EPRO PR 6426) to form a complete and functional measuring chain. The -05 suffix in the middle typically specifies a standard temperature rating.
Application Scenarios
This 11 mm eddy current probe is designed for heavy-duty applications where larger probe size and robust construction are required for reliable operation in demanding industrial environments.
Typical Application Scenarios:
Large Turbine and Compressor Monitoring:
Used on heavy-duty gas and steam turbines, as well as large centrifugal compressors where the larger 11 mm probe size provides enhanced durability and stability in high-vibration environments
Heavy Industrial Machinery:
Suitable for monitoring large pumps, generators, and other heavy rotating equipment in power generation, oil & gas, and marine industries
Axial Thrust Position Monitoring:
Mounted at shaft ends to monitor rotor axial movement in large machinery where the increased probe size offers better mechanical stability
High-Vibration Environments:
Ideal for applications with significant mechanical vibration where the larger mass and size of the 11 mm probe provide improved reliability compared to smaller 8 mm probes
Industries of Use:
Power Generation (Large Gas & Steam Turbines)
Oil & Gas (Large Pipeline Compressors)
Heavy Industrial Manufacturing
Marine Propulsion Systems
Hydroelectric Power Generation
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