Introduction
The EPRO 330101-00-20-10-11-05 is a specific configuration of a Proximitor Transducer, a critical signal conditioning unit within the EPRO (Baker Hughes) machinery condition monitoring system. This device forms the essential link between a non-contact eddy current proximity probe and the monitoring system.
Its primary function is to power an 8 mm eddy current probe, demodulate the probe's high-frequency RF signal, and convert the information about the gap between the probe tip and a rotating shaft into stable, standardized DC voltage outputs. These outputs represent both dynamic vibration (AC voltage) and static position (DC gap voltage). The specific suffixes indicate a configuration with a 1.0-meter integrated cable and a 1 mm linear range, making it suitable for applications requiring high precision over a smaller displacement range.
Parameters / Specifications
The key technical specifications for the EPRO 330101-00-20-10-11-05 are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 330101-00-20-10-11-05 |
| Product Line / Type | EPRO (Baker Hughes) Proximitor Transducer |
| Function | Signal Conditioner for 8 mm Eddy Current Probes |
| Compatible Probes | 8 mm Eddy Current Probes (e.g., PR 6423 series) |
| Input Power | Typically +24 V DC |
| Output Signals | Vibration/Displacement: -1 to -11 V DC (or -2 to -22 V DC) proportional to gap. Gap Voltage: A separate DC voltage proportional to the average gap. |
| Linear Range | 1 mm (This is a key interpretation of the -11 suffix, e.g., 1.0 mm to 2.0 mm). |
| Frequency Response | 0 to 10 kHz (-3 dB) |
| Operating Temperature | -35°C to +85°C (-31°F to +185°F) |
| Integrated Cable Length | 1.0 meter (This is a key interpretation of the -20 suffix). |
| Connector | Integrated, unconnectorized cable (This is a key interpretation of the -00 suffix). |
| Mounting Thread | M10x1 (This is a key interpretation of the -05 suffix). |
| Housing Dimensions (Approx.) | Compact metal enclosure, typically around 80 mm x 60 mm x 40 mm (L x W x H). |
| Weight (Approx.) | 0.55 lbs (0.25 kg) |
| Degree of Protection | IP67 (Typical for such industrial housings) |
Note: This proximitor requires a compatible 8 mm eddy current probe and a suitable power supply to form a complete measuring chain. The -10 suffix typically specifies a standard temperature rating.
Application Scenarios
This proximitor transducer with a 1mm range is designed for high-precision monitoring applications on critical rotating machinery where smaller displacements need to be measured with high resolution.
Typical application scenarios include:
High-Precision Vibration Monitoring:
Used on high-speed turbines and compressors where vibration amplitudes are typically smaller and require a more sensitive measurement range. The 1mm range provides better resolution for detecting incipient faults.
Precision Thrust Position Monitoring:
Ideal for monitoring axial position in applications with very tight thrust bearing clearances, where the total rotor float is small and requires precise measurement.
Shaft Eccentricity (Slow-Roll) Monitoring:
Provides accurate measurement of slow-roll eccentricity during machine startup and shutdown, capable of detecting very small shaft bows or bends.
Tight Clearance Machinery:
Suitable for monitoring machinery with inherently small radial clearances where the 2mm standard range would not provide optimal resolution.
Industries of Use:
Power Generation (High-speed Gas Turbines)
Oil & Gas (High-speed Pipeline Compressors)
Petrochemical & Refining
Precision Manufacturing
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