Overview
The EPRO PR6423/10R-040-HT is an 8 mm eddy current proximity probe designed for non-contact shaft displacement measurement. Paired with the CON021 signal converter, it forms a measurement system that converts probe movement into an electrical output for monitoring equipment. Furthermore, the probe features an extended operating temperature range of -35 to +220 deg C for installation in high-temperature measurement locations.
Probe Measurement and Operating Characteristics
The PR6423/10R-040-HT measures shaft displacement through eddy current technology. It detects changes in the distance between the probe tip and a conductive target without mechanical contact. The nominal linear measurement range is 2 mm, allowing the system to monitor shaft position and movement within its calibrated range.
The probe has a sensitivity of 8 V/mm +/-5%, calibrated under a reference condition of 0-45 deg C. Its linearity deviation is +/-0.025 mm within the calibrated range. In addition, the installation air gap is approximately 0.5 mm, and the specified minimum shaft diameter is 25 mm.
High-Temperature and Environmental Performance
The HT configuration supports an operating temperature range of -35 to +220 deg C. Its IP66 protection rating, according to IEC 60529, indicates protection against dust ingress and powerful water jets. Therefore, the probe is specified for measurement locations where elevated temperatures and environmental exposure are important selection factors.
The target material must be ferromagnetic steel, such as 42CrMo4 or an equivalent AISI 4140 grade. Target material and installation clearance affect the measurement characteristics, so the specified material and calibrated installation conditions should be maintained.
CON021 Signal Converter
The CON021 processes the eddy current probe signal and provides an electrical output for connection to monitoring equipment. It supports a signal bandwidth of 0-20 kHz at -3 dB and a rise time below 15 us. These characteristics define its frequency response and signal response speed.
Furthermore, the converter supports two output voltage ranges: -4 to -20 V and -2 to -18 V. Its DC supply range is -23 to -32 V. The selected output scaling must match the receiving monitoring channel and the intended measurement configuration.
Technical Specifications
Probe Unit: PR6423/10R-040-HT
| Parameter | Specification |
|---|---|
| Model | PR6423/10R-040-HT |
| Brand | EPRO |
| Product Type | Eddy Current Proximity / Displacement Probe |
| Sensor Type | Eddy Current |
| Probe Diameter | 8 mm |
| Linear Measuring Range | 2 mm (80 mils nominal window) |
| Installation Air Gap | Approx. 0.5 mm |
| Sensitivity | 8 V/mm +/-5% |
| Sensitivity Reference Condition | 0-45 deg C |
| Linearity Deviation | +/-0.025 mm |
| Minimum Shaft Diameter | 25 mm |
| Target Material | Ferromagnetic steel |
| Operating Temperature | -35 to +220 deg C |
| Protection Rating | IP66 |
| Protection Standard | IEC 60529 |
Converter Unit: CON021
| Parameter | Specification |
|---|---|
| Model | CON021 |
| Brand | EPRO |
| Product Type | Eddy Current Signal Converter |
| Signal Bandwidth | 0-20 kHz (-3 dB) |
| Rise Time | Less than 15 us |
| Supply Voltage | -23 to -32 VDC |
| Output Signal Range | -4 to -20 V or -2 to -18 V |
| Housing Material | Die-cast aluminum alloy (GD-AlSi9Cu3) |
| Protection Rating | IP65 |
| Weight | 0.6 kg |
Frequently Asked Questions
Q: What is the difference between PR6423/10R-040-HT and CON021?
A: The PR6423/10R-040-HT is the eddy current probe that detects shaft displacement. The CON021 is the signal converter that processes the probe signal and provides the corresponding electrical output.
Q: Can the PR6423/10R-040-HT operate at temperatures up to 220 deg C?
A: Yes. The specified operating temperature range is -35 to +220 deg C. This extended temperature rating applies to the probe unit; it should not be interpreted as the operating temperature rating of the CON021 converter.
Q: Which target materials are suitable for this probe?
A: The specified target material is ferromagnetic steel, such as 42CrMo4 or an equivalent AISI 4140 grade. The minimum shaft diameter is 25 mm, and the installation air gap is approximately 0.5 mm.
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