Overview
The EPRO PR6424/002-031 is an eddy current proximity sensor designed for non-contact measurement of shaft displacement and vibration in rotating machinery. It detects the movement of ferromagnetic targets and provides measurement signals for condition monitoring. The sensor is specified for use with a CON021 eddy-current signal converter, which processes the probe signal into a standard output for monitoring equipment.
Key Features
- Non-contact eddy current measurement for rotating machinery.
- Designed for ferromagnetic steel targets, including 42CrMo4 standard steel.
- Supports high-speed measurement applications.
- Compatible with the CON021 signal converter configuration.
- Suitable for shaft measurement where the specified minimum shaft diameter is 80 mm.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | PR6424/002-031 |
| Brand | EPRO |
| Product Type | Eddy Current Proximity Sensor |
| Target Material | Ferromagnetic steel |
| Reference Target Material | 42CrMo4 standard steel |
| Maximum Surface Speed | 2,500 m/s (98,425 ips) |
| Minimum Shaft Diameter | 80 mm |
| Associated Signal Converter | CON021 |
| Converter Input Compatibility | PR6422 through PR6426 eddy-current sensors |
| Converter Sensor Connector | Self-locking LEMO socket |
| Converter Supply Voltage | -24 VDC nominal |
| Converter Supply Range | -23 to -32 VDC |
| Converter Standard Output | -4 to -20 mA or -2 to -18 mA |
| Converter Frequency Response | 0 to 20 kHz |
| Converter Rise Time | Less than 15 us |
| Converter Gain Error | Less than 1% from 0 to 1,000 Hz |
| Converter Operating Temperature | -30 to +100 deg C |
| Manufacturer | EPRO |
Sensor and Converter Configuration
The PR6424/002-031 operates on the eddy current measurement principle. The probe generates an electromagnetic field near the conductive steel target. As the distance between the probe tip and the shaft surface changes, the electrical characteristics of the probe circuit also change. The measurement system converts these changes into a signal proportional to the target displacement.
Furthermore, the CON021 converter provides signal conditioning for compatible PR6422 through PR6426 sensors. Its selectable standard output ranges support connection to suitable monitoring and measurement equipment. The converter’s 20 kHz frequency response also supports dynamic measurement signals.
Application and Selection Considerations
When selecting this sensor configuration, check the target material, shaft diameter and mechanical installation conditions. The specified 42CrMo4 steel reference material is particularly relevant because target material properties can affect eddy current measurement characteristics.
In addition, verify the converter supply polarity and voltage range before wiring. The required output range (-4 to -20 mA or -2 to -18 mA) should match the input configuration of the connected monitoring system.
Frequently Asked Questions
Q: Which signal converter is specified for the PR6424/002-031?
A: The associated converter is the EPRO CON021 eddy-current signal converter. It accepts compatible PR6422 through PR6426 sensor inputs.
Q: What target material does the PR6424/002-031 measure?
A: The specified target material is ferromagnetic steel, with 42CrMo4 given as the reference standard. Target material should be considered when checking measurement calibration and installation requirements.
Q: What output signals does the CON021 provide?
A: The CON021 provides standard current outputs of -4 to -20 mA or -2 to -18 mA. Confirm the required output configuration against the receiving monitoring equipment before installation.
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