Introduction
The EPRO 330103-01-08-10-02-00 is a specific model of an 8 mm eddy current proximity probe. It is a fundamental sensor used for continuous monitoring and protection of critical rotating machinery, forming part of the EPRO MMS 6000 and other compatible systems.
This sensor operates on the eddy current principle to precisely measure the relative displacement between the probe tip and a rotating metal shaft. It is designed to detect dynamic motion (vibration) and static position (e.g., shaft runout or thrust position) by generating a high-frequency electromagnetic field. Changes in the distance to the shaft alter the field, which is converted into a precise voltage signal by a separate proximitor (e.g., PR 6426). Its primary role is to enable predictive maintenance and prevent machine failure by detecting faults like unbalance, misalignment, and bearing issues at an early stage.
Parameters / Specifications
The key technical specifications for the EPRO 330103-01-08-10-02-00 are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 330103-01-08-10-02-00 |
| Product Line / Type | EPRO (Baker Hughes) PR 6423 Series Eddy Current Proximity Probe |
| Probe Diameter | 8 mm |
| Thread Size | M10 x 1.0 |
| Sensitivity (Standard) | -8.0 V/mm (± 5%) / -200 mV/mil |
| Linear Range | 0.8 mm (0.8 to 1.6 mm from probe tip) / 80 mils (80 to 160 mils) |
| 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 | 1.0 meter (This is a key interpretation of the -08 suffix in the part number) |
| Connector | Integrated, unconnectorized cable (This is a key interpretation of the -01 suffix). |
| Dimensions (Probe) | Body Diameter: 8 mm; Thread: M10 x 1.0; Length is application-specific. |
| Weight (Probe only) | Approx. 0.11 lbs (0.05 kg) |
*Note: This sensor must be used with a matching extension cable and a compatible proximitor (e.g., EPRO PR 6426) to form a complete and functional measuring chain. The "02-00" suffix may indicate specific calibration or special market approval.*
Application Scenarios
This sensor is a critical component for condition monitoring in industries where the reliability of high-speed rotating equipment is paramount. It is used to measure Relative Vibration and Axial Position.
Typical application scenarios include:
Radial Vibration Monitoring on Turbines and Compressors:
Mounted perpendicular to the shaft on bearing housings to measure the vibration of the shaft relative to the housing. This is essential for detecting unbalance, misalignment, and oil whirl in gas/steam turbines and centrifugal compressors.
Axial Thrust Position Monitoring:
Mounted at the shaft end to monitor the axial movement (rotor position) to prevent catastrophic thrust bearing failure, which is a common and severe fault in turbines and compressors.
Critical Pump and Fan Protection:
Used on large, high-energy pumps in the oil & gas, power, and water industries to monitor vibration levels, detecting issues like cavitation, impeller problems, and bearing wear before they lead to downtime.
Keyphasor® / Timing Reference:
Used with a once-per-revolution notch on the shaft to provide a keyphasor signal for measuring phase angle, which is vital for balancing machinery and analyzing vibration modes.
Industries of Use:
Oil & Gas (Pipeline compressors, gas turbines)
Power Generation (Gas, steam, and hydro turbines)
Petrochemical & Refining
Marine (Main propulsion turbines)
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