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Product Introduction
The Epro PR6423/013-000 + CON021 is a high-precision eddy current displacement sensor system, engineered specifically for non-contact measurement of shaft vibration, position, and displacement in rotating machinery. It is part of the PR6423 series developed by Epro (now part of Emerson), and paired with the CON021 signal converter, it offers stable, accurate signal output in highly demanding industrial environments.
Designed to meet the stringent reliability requirements of turbomachinery, the sensor operates based on the eddy current principle, where changes in distance between the sensor tip and a conductive target (typically the rotating shaft) are translated into an electrical signal. Its 8 mm diameter probe allows for compact installation in tight spaces without compromising sensitivity.
This sensor system is widely used in turbines, compressors, motors, pumps, and other critical assets in power generation, petrochemical, oil & gas, and heavy manufacturing industries. The combination of the PR6423 probe and the CON021 converter ensures compatibility with various monitoring systems such as MMS 6000, MMS 3000, and other condition monitoring platforms.
Product Specifications
| Parameter | Description |
|---|---|
| Model Number | PR6423/013-000 + CON021 |
| Sensor Type | Eddy Current Displacement Sensor |
| Measurement Range | 0 to 2 mm (typical), depending on system configuration |
| Sensor Head Diameter | 8 mm |
| Output Signal | 4–20 mA or voltage output via CON021 |
| Sensitivity | 7.87 mV/μm (±2%) |
| Linear Range | ±1 mm from calibrated midpoint |
| Target Material | Typically 4140 steel or similar conductive surfaces |
| Operating Frequency | DC to 10 kHz |
| Operating Temperature | -35 °C to +180 °C (sensor only) |
| Storage Temperature | -40 °C to +200 °C |
| Protection Class | IP68 (fully sealed) |
| Shock Resistance | 100 g, 11 ms duration |
| Vibration Resistance | 20 g peak, 10–2000 Hz |
| Isolation Resistance | > 100 MΩ |
| Enclosure Material | Stainless Steel |
| Approvals | CE, ATEX Zone 0/1 (with suitable cable and converter), IECEx |
| Weight | 0.22 kg |
Product Applications
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Steam and Gas Turbines: Measures axial and radial shaft vibration for condition-based maintenance and trip protection.
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Centrifugal Compressors: Detects shaft motion in real-time to prevent surge and mechanical damage.
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Large Industrial Motors: Tracks rotor position and vibration for imbalance or misalignment detection.
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Pumps in Petrochemical Plants: Used in high-reliability environments to monitor shaft movement under load.
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Gearboxes and Rotors: Provides critical shaft position data to monitor bearing wear and gear mesh anomalies.
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Hydropower Equipment: Installed in water turbines for online vibration diagnostics in hard-to-reach areas.
Product Advantages
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Non-Contact Measurement: Eliminates mechanical wear and ensures consistent accuracy over time.
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High Precision and Sensitivity: Offers resolution in micrometers, crucial for early fault detection.
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Wide Operating Temperature Range: Suitable for harsh process conditions and high-temperature zones.
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Robust Design: IP68-rated, vibration and shock-resistant design for long-term industrial use.
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Flexible Installation: Slim 8 mm probe allows placement in tight shaft clearance areas.
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Full System Integration: Works seamlessly with CON021 converter and Epro monitoring systems like MMS6000.
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Global Certifications: Compliant with CE, ATEX, and IECEx standards for hazardous environments.
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Long-Term Stability: High immunity to electromagnetic interference and thermal drift.
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Custom Cable Lengths: Offers installation flexibility in varied plant layouts.
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Maintenance-Free Operation: No recalibration required under stable operating conditions.
Frequently Asked Questions (FAQ)
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What is the typical measurement range of the PR6423/013-000 sensor?
The standard linear range is ±1 mm, depending on calibration and system configuration. -
Is this sensor suitable for use in hazardous areas?
Yes, with proper installation and certified accessories, it meets ATEX and IECEx Zone 0/1 requirements. -
Can I use this sensor with non-Epro systems?
Yes, the CON021 converter provides standard analog outputs that can interface with many third-party systems. -
How is the probe installed on rotating machines?
It is typically mounted through a radial or axial access port using threaded sleeves or custom holders. -
Does it support online condition monitoring?
Yes, it provides real-time output for continuous monitoring and integration into SCADA or DCS systems. -
What kind of shaft material is best for accurate readings?
Conductive ferrous materials like 4140 steel are preferred for accurate eddy current detection. -
Is calibration required after installation?
Factory calibration is standard; however, system verification post-installation is recommended. -
Can I replace the CON021 without reconfiguring the entire system?
Yes, the system supports module-level replacement with minimal setup changes. -
What’s the maximum cable length supported?
Typically up to 10 meters, longer lengths may require specific signal conditioning adjustments. -
How is the sensor protected against environmental ingress?
The sensor has an IP68 rating, ensuring complete protection against dust and prolonged immersion.
Related or Compatible Models (Same Series)
| Model Number | Description | Probe Diameter | Cable Length | Temperature Range |
|---|---|---|---|---|
| PR6423/010-010 + CON021 | Standard 8 mm sensor with 10 m cable | 8 mm | 10 m | -35°C to +180°C |
| PR6423/005-010 + CON021 | Short probe version, ideal for tight spaces | 8 mm | 10 m | -35°C to +180°C |
| PR6423/002-030 + CON021 | 5 mm probe, extended temperature range | 5 mm | 3 m | -35°C to +220°C |
| PR6423/004-010 + CON021 | 8 mm probe with axial mount configuration | 8 mm | 10 m | -35°C to +180°C |
| PR6423/012-030 + CON021 | High-resolution sensor for fine monitoring | 8 mm | 3 m | -35°C to +180°C |
| PR6423/014-040 + CON021 | Long probe design for deep-set shafts | 8 mm | 4 m | -35°C to +180°C |
Popular Emerson (Epro) Products Across Categories
| Model Number | Description | Category | Signal Type | Application |
|---|---|---|---|---|
| MMS6312 | Vibration monitoring module for rack systems | Monitoring Module | Analog/Digital | Turbine Protection |
| MMS3120/022-100 | 2-channel vibration monitoring card | Condition Monitoring | Analog | General Machinery Monitoring |
| CON041 | Signal converter for PR6424 sensors | Signal Converter | Voltage/Current | PR6424 Series Integration |
| PR6424/010-010 | Eddy current sensor with high-temp capability | Displacement Sensor | Eddy Current | Hot Zones / Bearing Monitoring |
| MMS6110 | Dual-channel diagnostic module | Diagnostic Module | Mixed | Machine Vibration Analysis |
| PR9268/203-000 | Velocity sensor for low-frequency applications | Velocity Sensor | Piezoelectric | Slow Rotating Equipment |
