Introduction
The EPRO PR 6423/000-030 is a non-contact, eddy current displacement sensor (probe) designed for continuous monitoring and protection of critical rotating machinery. It is a fundamental component of the EPRO MMS 6000 and other machinery management systems.
This sensor operates on the eddy current principle to precisely measure the relative vibration and axial position of a shaft relative to its housing (bearing). It converts the distance between the probe tip and the rotating shaft into a standardized electrical signal, which is then interpreted by a monitoring system like the EPRO PR 6426. Its primary role is to detect early signs of machine fault, such as unbalance, misalignment, and oil whirl, enabling predictive maintenance and preventing catastrophic failures.
Parameters / Specifications
The key technical specifications for the EPRO PR 6423/000-030 are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | PR 6423/000-030 (Base model for 330104-00-15-10-01-CN) |
| Product Line | EPRO (Baker Hughes) |
| Type | Eddy Current Proximity Probe / Sensor |
| Probe Diameter | 8 mm (Standard) |
| Sensitivity | -8.0 V/mm (± 5%) / -200 mV/mil (e.g., 2.0 V/mm gap voltage change per 0.254 mm displacement) |
| 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 | Typically -24 V DC from the connected monitor (e.g., PR 6426) |
| Output Signal | A modulated radio frequency (RF) signal that is demodulated by a separate proximitor. |
| Cable Length | 1.0 meter (3.28 ft) integrated cable from probe (standard for this variant). *Note: The "xx-01" in your PN may specify a different length.* |
| Connector | Integral cable for direct connection to an extension cable or junction box. |
| Dimensions (Probe) | Body Diameter: 8 mm, Thread: M10 x 1.0. Overall length varies with installation. |
| Weight (Probe only) | Approx. 0.11 lbs (0.05 kg) |
Note: The exact dimensions and weight are for the probe itself. The system requires a matching extension cable and a proximitor (e.g., PR 6426) to form a complete measuring chain.
Application Scenarios
The EPRO PR 6423 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:
Turbine & Compressor Monitoring:
Radial Vibration: Mounted on bearing housings to measure the vibration of the shaft relative to the housing in turbines, centrifugal compressors, and steam turbines. This is crucial for detecting unbalance, misalignment, and bearing issues.
Axial Thrust Position: Mounted at the shaft end to monitor the axial movement (rotor position) to prevent catastrophic thrust bearing failure.
Large Pumps and Fans:
Protecting critical pumps in the oil & gas, power, and water industries by monitoring vibration levels to detect cavitation, impeller problems, and bearing wear.
Generators and Electric Motors:
Monitoring vibration on large HV motors and generators to ensure operational integrity and prevent downtime.
Gearboxes:
Monitoring shaft vibration on the input and output shafts of high-power gearboxes to detect issues related to gear mesh and alignment.
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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