Excellent PLC
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Product Introduction
The Epro PR6423/000-031-CN is a high-performance eddy current proximity probe designed for non-contact measurement of shaft displacement, vibration, and axial position in critical rotating machinery. Paired with the CON021 converter, this system transforms mechanical movement into a linear voltage output, ideal for integration with monitoring systems.
Manufactured by Epro (a division of Emerson), the sensor is widely recognized in industrial applications that demand precision, long-term reliability, and harsh-environment durability. The 8mm tip variant offers a balanced combination of resolution, sensitivity, and mechanical robustness, making it suitable for turbines, compressors, gearboxes, and motors.
Product Specifications
| Parameter | Description |
|---|---|
| Model Number | PR6423/000-031-CN |
| Converter Module | CON021 |
| Sensor Head Diameter | 8 mm |
| Sensing Range | 0.25 mm to 2.0 mm (typical linear range) |
| System Output | 4 mV/µm (nominal with CON021) |
| Linearity | ±1% over calibrated range |
| Probe Material | Stainless steel (AISI 303/304 equivalent) |
| Cable Length | 5 meters (customizable options available) |
| Mounting Thread | M10 x 1 or 3/8″-24 UNF (custom options available) |
| Operating Temperature (Probe) | -35°C to +180°C |
| Operating Temperature (CON021) | -20°C to +70°C |
| Frequency Response | 0 to 10 kHz (typical, depending on application) |
| Shock Resistance | 1000 g peak |
| Vibration Resistance | 20 g, 10–2000 Hz |
| Ingress Protection (Probe Head) | IP67 |
| Weight | 0.22 kg |
| Compliance | CE, RoHS |
Product Applications
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Steam and Gas Turbines: Monitoring shaft displacement and dynamic vibration.
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Compressors: Measuring axial thrust position and radial movement.
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Gearboxes: Detecting excessive shaft movement and wear.
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Electric Motors: Preventing bearing failure through early fault detection.
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Pumps and Fans: Non-contact vibration monitoring for predictive maintenance.
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Hydropower Systems: Detecting rotor-stator alignment and dynamic behavior.
The sensor plays a critical role in machine protection systems (like MMS 6000, Bently Nevada, or other condition monitoring platforms) to prevent catastrophic equipment failure.
Product Advantages
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High Precision Measurement: Linear and stable voltage output even in dynamic applications.
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Robust Construction: Designed for use in demanding industrial environments, with stainless steel housing and high ingress protection.
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Wide Compatibility: Fully compatible with Epro’s MMS series, as well as third-party vibration monitoring systems.
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Flexible Installation: Customizable cable lengths and mounting threads for retrofits and new builds.
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Long Operational Life: Proven MTBF and minimal signal drift over time.
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Non-contact Sensing: Eliminates mechanical wear, ensuring continuous and maintenance-free operation.
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EMC Compliance: Built to function reliably in electrically noisy environments.
Frequently Asked Questions (FAQ)
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What is the difference between PR6423 and PR6422?
The PR6423 is an 8 mm sensor, offering higher range and robustness, while PR6422 has a smaller diameter (typically 5 mm), suited for tighter spaces. -
Is CON021 mandatory with PR6423?
Yes. CON021 acts as a signal converter, translating the raw eddy current into a usable voltage signal. -
Can I use this sensor in hazardous areas?
Versions with ATEX and IECEx certifications are available for use in Zone 1 and Zone 2 areas. -
What cable length can I use without signal degradation?
Standard lengths go up to 9 meters. For lengths over 5 meters, signal quality must be verified and possibly recalibrated. -
How often should this sensor be recalibrated?
Typically every 3 to 5 years, depending on the operational environment and monitoring requirements. -
Does it support high-speed rotating machinery?
Yes, it is designed for frequencies up to 10 kHz, supporting high-speed applications. -
Can this sensor be used with Bently Nevada systems?
It can work with third-party systems, but signal compatibility and calibration should be confirmed. -
Is the sensor head replaceable?
The probe is not designed for field repair. If damaged, the complete assembly should be replaced. -
How does electromagnetic interference affect sensor performance?
The sensor and CON021 module are shielded and designed to meet EMC standards. However, routing cables away from power lines and using proper grounding are essential to minimize any interference in harsh industrial environments. -
What is the recommended installation clearance?
A minimum of 8 mm clearance from the shaft is recommended for optimal linear response and protection.
Related Models from the Same Series or Type
| Model Number | Description | Probe Size | Output | Cable Length |
|---|---|---|---|---|
| PR6423/000-000 + CON021 | Standard 8mm eddy current probe system | 8 mm | 4 mV/µm | 5 m |
| PR6423/002-030 + CON021 | High-temp version with 8mm probe | 8 mm | 4 mV/µm | 5 m |
| PR6423/003-010 + CON021 | Axial position measurement variant | 8 mm | 4 mV/µm | 10 m |
| PR6423/004-010 + CON021 | Extended cable configuration | 8 mm | 4 mV/µm | 10 m |
| PR6423/005-010 + CON021 | Turbine-specific sensor version | 8 mm | 4 mV/µm | 10 m |
| PR6423/006-000 + CON021 | Short-body design for compact installations | 8 mm | 4 mV/µm | 5 m |
Popular Models from the Same Brand (Epro / Emerson)
| Model Number | Description | Application | Output Signal |
|---|---|---|---|
| MMS3120/022-100 | Vibration monitoring module with 2-channel input | General machinery monitoring | 4–20 mA / Relay |
| MMS3110/022-000 | Compact 1-channel vibration monitor | Pumps, Motors | Relay / Analog |
| PR6424/000-030 + CON041 | 5 mm eddy current sensor system | Tight-space monitoring | 7.87 mV/μm |
| PR6425/010-140 + CON011 | 11 mm probe for large shaft diameter | Turbines, Generators | 4 mV/μm |
| MMS6120/012-000 | Central signal processing unit | System integration | Digital bus |
| CON031 | Advanced converter with diagnostics | Paired with PR6423 Series | Analog + digital |
