Introduction
The EPRO 330104-00-10-90-02-00 is a specific configuration of an 8 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.
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 (e.g., shaft runout, thrust position). This specific variant features a 3-meter integrated cable, high-temperature capability, and a 2 mm linear range, making it suitable for demanding applications requiring a wider measurement window and longer cable reach in elevated temperature environments.
Parameters / Specifications
The key technical specifications for the EPRO 330104-00-10-90-02-00 are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 330104-00-10-90-02-00 |
| Product Line / Type | EPRO (Baker Hughes) Eddy Current Proximity Probe |
| Probe Diameter | 8 mm |
| Thread Size | M10 x 1.0 |
| Sensitivity | -8.0 V/mm (± 5%) / -200 mV/mil |
| Linear Range | 2.0 mm (This is a key interpretation of the -02 suffix, e.g., 1.0 mm to 3.0 mm). |
| Operating Temperature | Up to 150°C (302°F) for probe (The -90 suffix typically indicates a high-temperature cable and rating). |
| 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 | 3.0 meters (This is a key interpretation of the -10 suffix in the part number). |
| Connector | Integrated, unconnectorized cable (This is a key interpretation of the -00 suffix). |
| Mounting Thread | M10x1 (This is a key interpretation of the -00 suffix at the end). |
| Dimensions (Probe) | Body Diameter: 8 mm; Thread: M10 x 1.0; Length is application-specific. |
| Weight (Probe only) | Approx. 0.13 lbs (0.06 kg) |
Note: This sensor must be used with a compatible proximitor (e.g., EPRO PR 6426) to form a complete and functional measuring chain.
Application Scenarios
This high-temperature 8 mm eddy current probe is designed for demanding applications on critical rotating machinery where elevated ambient temperatures are a concern.
Typical application scenarios include:
Gas & Steam Turbine Vibration Monitoring:
Mounted on bearing housings close to the hot gas path to measure radial shaft vibration. The high-temperature rating ensures reliable operation in the elevated ambient temperatures found around turbine casings.
Hot Section Compressor Monitoring:
Used on high-stage sections of centrifugal compressors in refining and petrochemical processes where process heat results in high bearing housing temperatures.
Axial Thrust Position Monitoring on Turbines:
Installed at the turbine shaft end to monitor rotor axial position. The 2mm linear range and high-temperature capability make it suitable for this critical protection function in hot environments.
High-Temperature Fan and Blower Bearings:
Monitoring vibration on fans and blowers in industrial processes such as cement kilns or power plant boiler systems, where ambient temperatures can be significantly elevated.
Industries of Use:
Power Generation (Gas, Steam, and Hydro Turbines)
Oil & Gas (Pipeline Compressors, Gas Turbines)
Petrochemical & Refining
Heavy Industrial Manufacturing
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