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- PR6423/10R-040-HT
- 8mm Eddy Current Sensor
- Germany
- 8 mm
- 0.1 kg
- Xiamen, China
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Product Overview
The Epro PR6423/10R-040-HT is an 8 mm eddy current sensor used for non-contact measurement of shaft movement and position in rotating machinery. It forms the machine-side sensing element in monitoring systems where the relative movement between a probe and conductive target must be detected without physical contact.
The sensor is installed near a suitable conductive surface, typically a rotating shaft or rotor. Changes in the distance between the probe and target alter the eddy current response, allowing the associated measurement electronics to determine changes in shaft position, displacement, or vibration-related movement.
The -HT configuration is suited to applications where the sensor installation is exposed to elevated-temperature conditions within the applicable system limits. This makes the configuration relevant to machinery such as turbines, compressors, and other rotating equipment where the sensing point may be located close to a heat-generating machine component.
The probe should be evaluated as part of the complete eddy current measurement channel. Signal-conditioning electronics, cable configuration, probe mounting, target characteristics, and the receiving monitoring equipment all influence the final measurement and should be considered during installation and troubleshooting.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Epro |
| Model | PR6423/10R-040-HT |
| Product Family | PR6423 Series |
| Product Type | 8mm Eddy Current Sensor |
| Primary Function | Non-contact shaft position and movement measurement |
| System Role | Eddy current displacement sensing |
| Sensing Principle | Eddy Current |
| Typical Application | Rotating machinery vibration and position monitoring |
| Sensor Head Diameter | 8 mm |
| Weight | 0.1 kg |
Product Features
- 8 mm eddy current sensor for non-contact rotating machinery measurement.
- Suitable for monitoring conductive shaft or rotor targets.
- Supports shaft position and displacement measurement.
- Can be incorporated into vibration-related monitoring channels.
- -HT configuration for applications involving elevated sensor installation temperatures within applicable system limits.
- Suitable for turbines, compressors, generators, motors, pumps, and other rotating equipment.
- Requires compatible signal-conditioning electronics for complete measurement operation.
- Suitable for continuous machinery monitoring and protection arrangements.
Working Principle
The PR6423/10R-040-HT generates an electromagnetic sensing field at the probe tip. When the probe is positioned near a conductive shaft or rotor, eddy currents are induced in the target. Movement of the target changes the electrical response of the sensing circuit.
The sensor signal is transferred through the associated connection to compatible signal-conditioning electronics. The conditioned output can then be evaluated by the machinery monitoring system for shaft displacement, position, vibration-related movement, alarm, or protection functions.
Conductive Shaft / Target → PR6423/10R-040-HT Sensor → Signal Conditioner / Driver → Monitoring System → Alarm / Protection
The elevated-temperature installation capability does not eliminate the need for correct probe positioning. Probe-to-target gap, alignment, target surface condition, cable routing, mounting stability, and operating temperature should all be considered when commissioning the measurement channel.
Role in an Epro Eddy Current Monitoring Architecture
The PR6423/10R-040-HT occupies the machine-side sensing layer of an Epro eddy current monitoring arrangement. It converts changes in the physical relationship between the probe and conductive target into a sensor response that can be processed by downstream electronics.
Rotating Shaft → PR6423/10R-040-HT → Signal Conditioning → Monitoring Input → Machinery Monitoring System → Alarm / Protection
| System Element | Function |
|---|---|
| Rotating Shaft / Target | Provides the conductive surface being monitored |
| PR6423/10R-040-HT | Detects changes in target-to-probe distance |
| Signal Conditioner / Driver | Processes the probe response for downstream equipment |
| Monitoring Input | Receives the conditioned measurement signal |
| Machinery Monitoring System | Evaluates shaft position, displacement, or vibration data |
| Alarm / Protection System | Generates configured warning or protective responses |
The sensor should be matched with the appropriate signal-conditioning equipment and installed according to the requirements of the complete monitoring channel.
Industrial Applications
| Application | Typical Use |
|---|---|
| Steam Turbines | Shaft position and displacement monitoring |
| Gas Turbines | Rotor movement monitoring in elevated-temperature areas |
| Compressors | Non-contact shaft displacement measurement |
| Generators | Rotor position and movement monitoring |
| Large Motors | Radial or axial shaft movement monitoring |
| Pumps | Continuous rotating shaft condition monitoring |
| Turboexpanders | High-speed shaft displacement measurement |
| Industrial Turbomachinery | Monitoring at demanding machine-side installation points |
| Machinery Protection Systems | Measurement input for configured alarm and protection functions |
Installation and Maintenance
- Verify the complete PR6423/10R-040-HT part number before installation.
- Confirm that the sensor’s temperature capability and configuration are suitable for the intended installation environment.
- Isolate the rotating equipment and follow the applicable site safety procedure before installing or servicing the probe.
- Inspect the sensor tip and housing for contamination, impact damage, or other physical abnormalities.
- Verify that the mounting arrangement allows correct positioning relative to the conductive target.
- Establish the required probe-to-target relationship according to the applicable Epro measurement-system requirements.
- Check probe alignment and ensure that the mounting structure remains secure during machine operation.
- Route the sensor cable to minimize mechanical stress, excessive bending, and unnecessary exposure to heat or electrical interference.
- Verify the connection between the probe and compatible signal-conditioning electronics or driver.
- Check the sensor output after installation and compare the measurement with expected machine operating conditions.
- If the signal changes unexpectedly, inspect the probe position, target surface, cable, temperature conditions, and signal-conditioning electronics before replacing the sensor.
- After replacement, perform a complete measurement-channel and machinery-monitoring functional test before returning the equipment to normal operation.
Compatible System Components
| Component | Function |
|---|---|
| Epro PR6423 Series Sensor | Provides non-contact eddy current measurement |
| Signal Conditioner / Driver | Processes the sensor response |
| Sensor Cable / Extension | Transfers the sensor signal to associated electronics |
| Monitoring Input Channel | Receives the conditioned measurement signal |
| Machinery Monitoring System | Evaluates shaft position and movement information |
| Alarm / Protection System | Generates configured alarm or protective responses |
| Conductive Shaft / Target | Provides the monitored target surface |
| Probe Mounting Hardware | Maintains sensor position and alignment |
| Machine Temperature Environment | Determines whether the selected sensor configuration is suitable |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Epro PR6423 Series | 8mm Eddy Current Sensor | Shaft displacement and vibration monitoring |
| Epro PR6423/10R-030-CN | 8mm Eddy Current Sensor | Rotating machinery monitoring |
| Epro PR6423/10R-030+CON021 | 8mm Eddy Current Sensor + Signal Converter | Combined measurement channel |
| Epro PR6423/10R-040-CN | 8mm Eddy Current Sensor | Standard installation configuration |
| Epro PR6423/01M-030 | 8mm Eddy Current Sensor | Non-contact shaft measurement |
| Epro PR6423/01M-030+CON021 | 8mm Eddy Current Sensor + Signal Converter | Combined monitoring channel |
| Epro PR6423/017-030-CN | 8mm Eddy Current Sensor | Machinery condition monitoring |
| Epro Eddy Current Signal Converters | Signal Conditioning Equipment | Sensor signal processing |
Key Advantages
- Provides non-contact measurement of conductive rotating machine targets.
- 8 mm probe configuration for compatible PR6423 monitoring systems.
- -HT configuration suited to applicable elevated-temperature installation conditions.
- Supports shaft position, displacement, and vibration-related monitoring.
- Can be integrated into continuous machinery protection and condition-monitoring systems.
- Suitable for demanding rotating machinery applications where the sensing point is exposed to higher temperatures.
Technical FAQs
What does the “-HT” designation indicate for the PR6423/10R-040-HT?
The -HT designation identifies a configuration intended for higher-temperature installation conditions. The actual allowable operating temperature should be confirmed against the applicable sensor specifications and complete installation requirements.
Where is the PR6423/10R-040-HT typically installed?
It is installed near a suitable conductive target on rotating machinery, such as a shaft or rotor. The installation location should be selected so that the probe can maintain the required target relationship while remaining within its applicable environmental limits.
Does the high-temperature configuration change the measurement principle?
No. The sensor still uses an eddy current sensing principle to detect changes in the distance between the probe and conductive target. The temperature-related configuration addresses the installation environment rather than changing the fundamental sensing method.
What should be checked if the probe signal drifts as machine temperature rises?
Check the probe mounting, target relationship, cable routing, environmental temperature, and associated signal-conditioning electronics. Temperature-related changes should be evaluated against the applicable operating limits before adjusting monitoring settings or replacing the probe.