Overview
The EPRO PR6423/00R-030 CON021, also cataloged as the PR6423 Eddy Current Displacement Sensor, operates as a non-contact measurement component for shaft displacement and relative vibration within machinery monitoring systems. The sensor uses an 8 mm probe body, a 2 mm measuring range, and a nominal 0.5 mm air gap.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PR6423/00R-030 CON021 |
| Brand | EPRO |
| Series | PR6423 |
| Product Type | Eddy Current Displacement Sensor |
| Origin | Germany |
| Weight | 0.25 kg |
| Dimensions | Estimated shipping size: 18 x 18 x 4 cm |
| Operating Temp | -30 to +100 deg C |
| Power Consumption | Not specified; supply current not provided |
| Measurement Principle | Eddy current, non-contact |
| Probe Diameter | 8 mm |
| Measuring Range | 2 mm |
| Air Gap | 0.5 mm |
| Shaft Diameter | 25 mm |
| Cable Length | 1 m |
| Frequency Range | 0 to 20000 Hz (-3 dB) |
| Rise Time | Less than 15 us |
| Supply Voltage | -23 to -32 VDC |
| Shock and Vibration | 5 g at 60 Hz at 25 deg C |
| Primary Measurement | Shaft displacement and relative shaft vibration |
The PR6423 provides a direct electrical representation of shaft position relative to the probe. Its eddy-current principle allows the sensor to measure displacement without mechanical contact. The specified 2 mm measuring range and 0.5 mm air gap define the probe-to-target operating geometry.
Eddy-Current Probe Scaling and Gap Voltage
The PR6423 uses an eddy-current measurement circuit to detect changes in the distance between the probe tip and a conductive shaft. Therefore, mechanical probe positioning directly affects the resulting electrical signal.
For a 25 mm shaft, the specified 0.5 mm air gap provides the reference installation condition supplied for this configuration. The installation should maintain the probe axis toward the shaft surface and prevent mechanical contact throughout shaft rotation.
The sensor operates from -23 to -32 VDC. The associated monitor or signal-conditioning circuit must match this supply requirement and the electrical characteristics of the PR6423 interface.
The specified frequency range extends from 0 to 20000 Hz at -3 dB. In addition, the rise time remains below 15 us, allowing the sensor to reproduce dynamic shaft movement for vibration and machinery-monitoring applications.
Frequently Asked Questions
Q: What is the specified measuring range of the PR6423/00R-030 CON021?
A: The specified measuring range is 2 mm. The supplied installation data specifies a 0.5 mm air gap.
Q: What supply voltage does the sensor require?
A: The specified supply voltage range is -23 to -32 VDC.
Q: What frequency range does the sensor support?
A: The specified frequency range is 0 to 20000 Hz at -3 dB, with a rise time below 15 us.
Field Installation Guidelines
- Install the probe with its sensing axis directed toward the conductive shaft surface.
- Establish the specified 0.5 mm air gap before commissioning.
- Verify that the probe does not contact the shaft during rotation or mechanical movement.
- Maintain the specified 25 mm shaft diameter condition for the supplied application data.
- Route the sensor cable separately from high-current switching conductors where practical.
- Avoid sharp bends, mechanical tension, and damage to the sensor cable during installation.
- Connect the sensor to a compatible EPRO measuring amplifier or machinery monitoring input.
- Verify the -23 to -32 VDC supply range before energizing the sensor.
- Confirm the actual sensor output and gap condition during commissioning.
- Follow the grounding and shielding arrangement specified for the complete EPRO measurement chain.
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