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- PR6424/007-110-CN
- 16 mm Eddy Current Sensor
- Germany
- 16 mm
- 0.2 kg
- Xiamen, China
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1. Product Overview
The Epro PR6424/007-110-CN 16 mm Eddy Current Sensor is a non-contact displacement sensing probe intended for industrial machinery monitoring applications. As part of the Epro PR6424 sensor family, it is associated with measuring shaft movement, relative displacement, and vibration in critical rotating equipment.
In industrial facilities, rotating machinery such as steam turbines, gas turbines, compressors, pumps, and generators often operates continuously under demanding mechanical and environmental conditions. Monitoring shaft movement is important for identifying changes in machine behavior, evaluating equipment condition, and supporting reliable operation.
An eddy current sensor measures the distance between its sensing tip and a suitable conductive metallic target without making physical contact. This makes the technology useful for applications where a rotating shaft must be monitored while the machine remains in operation.
The PR6424/007-110-CN is identified by its complete model number and a stated sensor head diameter of 16 mm. Its listed weight is 0.2 kg. Before purchasing or replacing this sensor, users should confirm the complete model code, probe dimensions, cable configuration, connector type, and compatibility with the existing signal converter.
The sensor should be considered part of a complete measurement arrangement rather than a standalone monitoring instrument. A suitable signal converter and monitoring system are normally required to turn the probe’s response into a usable measurement signal.
2. Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Epro |
| Model | PR6424/007-110-CN |
| Product Type | Eddy Current Sensor |
| Sensor Head Diameter | 16 mm, as specified for this product listing |
| Weight | 0.2 kg |
| Measurement Principle | Non-contact eddy current sensing |
| Typical Measurement Applications | Shaft displacement, relative vibration, and position monitoring |
| Typical Target | Suitable conductive metallic surface |
| Typical Industrial Equipment | Turbines, compressors, pumps, fans, and generators |
| System Integration | Compatible signal converter and monitoring electronics required |
| Installation | Machine-mounted probe installation according to the applicable system documentation |
The table above records the supplied product identification details and the sensor’s general function. The following information should be checked against the manufacturer’s documentation or the label on the actual unit before being used for engineering acceptance or replacement.
- Probe body dimensions and mounting thread.
- Cable length, cable type, and whether the cable is armored.
- Connector type and connection arrangement.
- Sensitivity and calibrated measurement range.
- Compatible signal converter model.
- Operating temperature and applicable environmental ratings.
- Any model-specific regional or configuration requirements associated with the “-CN” suffix.
PR6424 Series Performance Reference
Published specifications for the PR6424 16 mm sensor family provide the following general performance reference. These values should not be treated as independently verified, suffix-specific guarantees for every PR6424/007-110-CN configuration.
| Parameter | Published PR6424 Family Reference |
|---|---|
| Sensitivity/Linearity | 4 V/mm (101.6 mV/mil), linearity tolerance up to ±1.5% |
| Nominal Center Air Gap | Approximately 2.7 mm |
| Static Measurement Range | ±2.0 mm |
| Dynamic Measurement Range | 0 to 1,000 μm peak-to-peak |
| Long-Term Drift | Less than 0.3% |
| Reference Target Material | Ferromagnetic steel |
| Reference Shaft Diameter | 80 mm or greater |
| Sleeve Material | Stainless steel in documented configurations |
| Cable Material | PTFE in documented configurations |
| Weight Reference | Approximately 200 g for a documented sensor with 1 m cable and no armor |
Exact operating temperature, frequency response, thread dimensions, electrical sensitivity, and converter compatibility must be confirmed for the specific ordering code. Different probe configurations may have different mechanical or electrical characteristics.
3. Function and Working Principle
The PR6424 sensor family uses the eddy current principle to measure changes in the distance between a probe and a conductive target. The process can be divided into several stages.
3.1 Electromagnetic Field Generation
The sensing probe contains an electromagnetic coil. When connected to its compatible signal converter, the coil generates an electromagnetic field around the sensing tip.
When a conductive metal surface enters this field, electrical currents known as eddy currents are induced in the target. These currents influence the electrical characteristics of the probe and create a relationship between the probe’s response and the distance to the target.
3.2 Detection of Relative Movement
When the monitored shaft moves relative to the probe, the gap between the sensing tip and the shaft surface changes. This changes the electromagnetic coupling between the probe and the target.
The resulting electrical variation can be processed by the compatible converter to produce a signal corresponding to the measured displacement. Within the specified operating range, the system can provide information about relative shaft position and movement.
3.3 Shaft Position Measurement
A probe can be positioned to measure the relative position of a shaft at a particular point. Depending on the installation arrangement, this may support monitoring of radial movement or axial displacement.
Position measurements are useful when assessing changes in shaft location, operating clearances, or mechanical conditions that may affect rotating equipment.
3.4 Vibration Measurement
When installed in an appropriate orientation, an eddy current probe can detect dynamic shaft movement. The signal can then be evaluated by a suitable monitoring system to assess shaft vibration.
Vibration information can help engineers identify changes in machine behavior. However, vibration measurement alone does not automatically identify the cause of a fault. It should be evaluated alongside other measurements, operating conditions, and maintenance findings.
4. Role in Industrial Automation and Machinery Protection
The Epro PR6424/007-110-CN is a sensing component in a broader measurement and monitoring chain. Its output must be processed by compatible electronics before it can be used by a monitoring or protection system.
A typical arrangement may include the following components:
- Eddy current probe: Detects the relative distance between the sensing tip and the metallic target.
- Cable and connector assembly: Carries the probe signal to the associated electronics.
- Signal converter: Conditions the probe response and generates a usable measurement output.
- Machinery monitoring equipment: Processes the measurement and compares it with configured operating limits.
- Control or protection interface: Communicates relevant information to operators or connected plant systems.
When these components are correctly matched, the measurement system can provide shaft-related information for equipment monitoring and maintenance decisions.
For example, a monitoring channel may track shaft vibration during normal operation. If the measured value changes significantly or exceeds a configured alarm threshold, maintenance personnel can investigate the machine for potential mechanical problems.
Depending on the installed system, measurement information may also be used by a dedicated machinery protection arrangement. Alarm and shutdown actions are determined by the monitoring and protection equipment, its configuration, and the plant’s approved operating procedures. They are not performed by the sensor itself.
Correct probe selection, converter compatibility, installation quality, and calibration are therefore essential to the performance of the complete measurement chain.
5. Industrial Applications
5.1 Steam Turbines
Steam turbines contain high-speed rotating assemblies that must operate within defined mechanical limits. Shaft movement monitoring can help operators identify changes in vibration or relative position that may require further investigation.
A properly configured eddy current measurement system can provide data for turbine condition monitoring and machinery protection.
5.2 Gas Turbines
Gas turbines operate under high mechanical and thermal loads. Monitoring shaft movement can help maintenance teams track changes in rotor behavior and investigate abnormal operating trends.
The suitability of a specific probe configuration depends on the machine design, installation location, temperature conditions, and associated measurement electronics.
5.3 Hydro Turbines and Generators
Hydroelectric equipment can experience changing loads and operating conditions. Shaft position and vibration measurements can contribute to the assessment of rotating assembly stability.
A non-contact sensor provides a measurement method that does not require the probe to touch the moving shaft during normal operation.
5.4 Industrial Compressors
Compressors are widely used in chemical plants, refineries, gas processing facilities, and other continuous-process industries. Unexpected compressor problems can interrupt production and increase maintenance costs.
Shaft displacement and vibration data can support machinery monitoring when combined with other measurements, such as bearing temperature, pressure, and operating speed.
5.5 Pumps and Fans
Large industrial pumps and fans may operate continuously for long periods. Changes in shaft movement can be associated with mechanical wear, imbalance, misalignment, or other conditions that require inspection.
An eddy current probe can provide a dedicated non-contact measurement point when the target material and mounting arrangement meet the system requirements.
5.6 Oil, Gas, and Petrochemical Facilities
Oil and gas facilities rely on rotating equipment for compression, pumping, and process support. Continuous monitoring can help maintenance personnel identify abnormal trends and plan inspections.
The PR6424 family is intended for critical rotating machinery applications, but the exact probe configuration must be verified for the specific environment and measurement task.
5.7 Industrial Power Generation
Power plants use turbines, generators, pumps, and auxiliary machinery that may require continuous condition monitoring. Shaft measurement data can support operating assessments and maintenance planning when integrated into a suitable monitoring architecture.
6. Installation and System Integration
Correct installation is important for obtaining repeatable and meaningful measurements. Before installing the PR6424/007-110-CN, review the applicable technical documentation, machine drawings, wiring requirements, and existing monitoring-system configuration.
6.1 Confirm the Full Model Number
Verify the complete model designation on the installed sensor and compare it with the replacement unit. Similar product-family names do not necessarily indicate identical cable arrangements, dimensions, or electrical characteristics.
The “-CN” suffix should be retained when recording the ordering code. Any regional, configuration, or connection implications should be verified through the relevant product documentation.
6.2 Verify Mechanical Fit
Check the probe body dimensions, mounting thread, insertion length, and available installation space. Confirm that the probe can be mounted securely without interfering with the rotating shaft or other machine components.
Do not assume that the 16 mm head diameter defines the entire probe’s mechanical dimensions.
6.3 Confirm the Target Material
Eddy current sensors depend on the electromagnetic properties of the target material. Confirm that the monitored shaft material and surface condition meet the applicable sensor specifications.
Where the measurement system has been calibrated for a particular target material, substituting a different material may affect measurement accuracy.
6.4 Check the Cable and Connector
Inspect the cable configuration, length, connector type, and physical condition. Confirm that the cable assembly matches the required converter and installation arrangement.
Cable routing should follow the site’s requirements for mechanical protection and electrical noise control. Avoid tight bends, excessive tension, or routing that exposes the cable to avoidable damage.
6.5 Use a Compatible Signal Converter
The probe should be connected to the designated signal converter or other approved interface. Confirm the exact converter model and electrical compatibility before energizing the system.
Do not assume that the probe can be connected directly to a standard PLC analog input. The signal-conditioning requirements depend on the sensor configuration and the architecture of the monitoring system.
6.6 Set the Probe Gap Correctly
Position the probe according to the manufacturer’s installation procedure. The initial gap must place the sensor within its intended measurement range and allow the system to measure the expected shaft movement.
Incorrect positioning can cause inaccurate readings or reduce the available measurement range. Use the prescribed setup procedure rather than relying on visual estimation alone.
6.7 Commission and Validate the Channel
After installation, verify the measurement signal and check that the monitoring channel responds correctly. Depending on the system, commissioning may include checking the baseline value, signal scaling, polarity, alarm configuration, and channel status.
Record the results for future comparison. Any adjustments to machinery protection settings should follow the facility’s approved maintenance and commissioning procedures.
7. Compatible System Components
The PR6424/007-110-CN should be assessed as part of the complete measurement system. The following table identifies the main component categories that should be reviewed before installation or replacement.
| Component | Purpose | Compatibility Check |
|---|---|---|
| PR6424/007-110-CN probe | Detects shaft displacement or relative movement | Confirm the exact part number and probe configuration |
| Cable assembly | Carries the probe signal to the electronics | Verify cable length, construction, and connector |
| Signal converter | Conditions the probe signal | Confirm compatibility with the exact sensor variant |
| Machinery monitoring system | Processes and evaluates the measurement | Check input type, channel configuration, and signal scaling |
| Protection or control interface | Communicates alarms or measurements | Confirm system configuration and approved operating logic |
| Mounting hardware | Holds the probe in position | Verify thread, dimensions, clearance, and mechanical stability |
PR6424 systems are associated with compatible Epro/Emerson CON-series converters. However, the exact converter model must be selected using the relevant product documentation and existing system configuration. A converter should not be assumed compatible merely because it is used with another PR6424 probe.
8. Alternative Models and Replacement Considerations
If the original PR6424/007-110-CN is unavailable, a replacement should be evaluated against the complete system requirements rather than selected solely by its nominal sensor diameter.
| Replacement Candidate | Evaluation Approach | Important Consideration |
|---|---|---|
| Epro PR6424/007-110-CN with matching configuration | Preferred option for like-for-like replacement | Verify complete model code and physical configuration |
| Another PR6424 variant | Potential candidate if the original configuration cannot be sourced | Confirm dimensions, cable, sensitivity, and converter compatibility |
| Compatible probe and converter combination | Consider when the full measurement chain is being reviewed | May require configuration checks and recommissioning |
| Alternative manufacturer’s eddy current system | Consider only after a system-level compatibility assessment | May require different electronics, calibration, and mounting arrangements |
A different PR6424 suffix should not automatically be treated as a direct substitute. Variants can differ in probe length, cable configuration, connector, thread, or electrical characteristics.
Before ordering a replacement, compare the following details:
- Complete part number and suffix.
- Sensor head diameter and overall probe dimensions.
- Thread specification and insertion length.
- Cable length, cable construction, and connector.
- Sensitivity and measurement range.
- Compatible converter and monitoring equipment.
- Operating temperature and environmental requirements.
- Any required safety approvals for the installation.
For critical turbine, compressor, or generator monitoring channels, replacement selection should be reviewed by qualified instrumentation or machinery protection personnel.
9. Key Advantages
Non-Contact Measurement
Eddy current technology measures the distance between the probe and a conductive target without physical contact during normal operation. This makes it suitable for continuous monitoring of rotating shafts.
Support for Shaft Monitoring
When installed and configured correctly, a compatible measurement system can provide shaft position and dynamic movement information for machinery monitoring applications.
Integration with Industrial Monitoring Systems
The sensor can serve as a field-level measurement component in a broader system that includes signal conversion and monitoring electronics.
Useful for Critical Rotating Equipment
The PR6424 family is designed for applications involving turbines, compressors, pumps, fans, and other rotating machinery where shaft movement is an important operating parameter.
Support for Maintenance Decisions
Consistent measurement data can help maintenance teams establish baselines, observe changes over time, and determine when further investigation is needed.
Compact Sensing Head
The stated 16 mm sensor head diameter provides a defined sensing-head size for installation planning. The complete probe dimensions and mounting requirements must still be checked separately.
10. Technical FAQs
Q1. What is the Epro PR6424/007-110-CN?
It is identified as an Epro PR6424-family eddy current sensor for non-contact measurement applications. Its listed sensor head diameter is 16 mm, and its supplied product weight is 0.2 kg.
Q2. What is the sensor head diameter?
The supplied specification lists a 16 mm sensor head diameter. This does not represent the overall probe length or mounting dimensions.
Q3. What is the product weight?
The listed weight is 0.2 kg. For shipping calculations, confirm whether the value includes the cable, connector, or other accessories.
Q4. What does an eddy current sensor measure?
Depending on its configuration and installation, an eddy current sensor can measure the relative distance between the probe and a conductive metallic target. In machinery monitoring, this can support shaft position, displacement, and vibration measurements.
Q5. Does the sensor contact the rotating shaft?
No. Eddy current measurement is a non-contact method. The sensor detects changes in electromagnetic coupling between the probe and a suitable conductive target.
Q6. Can the PR6424/007-110-CN be connected directly to a PLC?
Direct connection should not be assumed. A compatible signal converter or designated interface is normally required. The appropriate connection arrangement depends on the exact sensor configuration and the existing monitoring system.
Q7. What equipment can use this type of sensor?
Typical applications include steam turbines, gas turbines, hydro turbines, compressors, pumps, fans, and generators. Actual suitability depends on the application, probe configuration, installation conditions, and signal-conditioning equipment.
Q8. Can another PR6424 sensor replace this model?
A different PR6424 variant may be a candidate, but compatibility must be verified. Compare the complete part number, probe dimensions, cable and connector, electrical characteristics, and converter requirements before making a substitution.
Q9. What should buyers check before ordering?
Confirm the complete part number, sensor head diameter, physical dimensions, cable arrangement, connector, product condition, and compatibility with the installed measurement system. For urgent maintenance, comparing the existing sensor label with the proposed replacement is particularly important.
Q10. Why should the complete suffix be checked?
The suffix forms part of the product’s identification and may distinguish different configurations. Two probes from the same family may not have identical mechanical or electrical characteristics.
11. Procurement and Replacement Considerations
When sourcing the Epro PR6424/007-110-CN, buyers should confirm the complete model number and the configuration required by the existing machinery monitoring system.
For replacement projects, the purchasing team should compare the existing unit’s label, cable arrangement, connector, probe dimensions, and converter model with the proposed item. This helps reduce the risk of receiving a sensor that belongs to the same family but does not fit the original installation.
For international procurement, it may also be useful to confirm product condition, packaging, shipping weight, lead time, warranty terms, and export documentation with the supplier.
If the sensor is used in a critical machinery protection channel, confirm that the replacement is suitable for the original measurement and protection arrangement before installation. Any required calibration, functional testing, or recommissioning should follow the facility’s approved procedures.
A product description that simply states “16 mm Eddy Current Sensor” is not enough to establish interchangeability. The complete ordering code and system compatibility remain essential purchasing criteria.
12. Conclusion
The Epro PR6424/007-110-CN 16 mm Eddy Current Sensor is a non-contact sensing component intended for industrial machinery measurement applications. The supplied product details identify a 16 mm sensor head diameter and a listed weight of 0.2 kg.
When incorporated into a compatible measurement system, an eddy current probe can provide useful information about shaft displacement, relative movement, and vibration in rotating machinery. Its performance depends on the correct probe configuration, target material, mounting arrangement, signal converter, and monitoring electronics.
For buyers and maintenance teams, verifying the full model designation and associated connection details is the most important step when sourcing a replacement. Careful compatibility checks help reduce installation risks and support reliable machinery monitoring in power generation, oil and gas, petrochemical, and other industrial applications.