Introduction
The EPRO 330103-00-11-90-02-CN is a specific configuration of an 8 mm Eddy Current Proximity Probe from the EPRO (Baker Hughes) PR 6423 series. This sensor is a core component in machinery condition monitoring systems, designed for non-contact measurement of relative shaft vibration and position.
This probe operates on the eddy current principle, generating an electromagnetic field at its tip. Changes in the distance to a conductive target (like a rotating shaft) alter this field, allowing for precise measurement of both dynamic vibration and static position. This particular model is defined by its 3-meter integrated cable and high-temperature capability, with the -CN suffix indicating it is configured or certified for the Chinese market.
Parameters / Specifications
The key technical specifications for the EPRO 330103-00-11-90-02-CN are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 330103-00-11-90-02-CN |
| Product Line / Type | EPRO (Baker Hughes) PR 6423 Series 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 -11 suffix in the part number). |
| Connector | Integrated, unconnectorized cable (This is a key interpretation of the -00 suffix). |
| Market Certification | CN (Configured/Certified for use in the Chinese market) |
| 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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