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Product Introduction
The Epro PR6423/00M-030 combined with the CON021 converter is a high-performance, non-contact eddy current sensor designed for continuous condition monitoring and protection of critical rotating machinery. It is part of the PR6423 series developed by Epro (now part of Emerson), widely used in applications such as turbines, compressors, gearboxes, and motors where precision shaft displacement and vibration monitoring are vital for operational reliability.
This specific model features an 8mm sensor tip, a metric thread, and is factory-calibrated for high accuracy in challenging industrial conditions. The sensor operates without physical contact, eliminating mechanical wear, and provides real-time shaft movement data. The system adheres to the API 670 standard, making it suitable for integration into global machinery protection systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Sensor Model | PR6423/00M-030 |
| Converter Model | CON021 |
| Sensor Type | Eddy Current Displacement Sensor |
| Sensor Head Diameter | 8 mm |
| Measurement Range | 0 to 2 mm (standard factory setting) |
| Calibration Code | 030 (calibrated for specific target material/distance) |
| Output Signal | Voltage (proportional to shaft displacement) |
| Sensitivity | Approx. 7.87 mV/μm |
| Frequency Response | 0 Hz to 10 kHz |
| Operating Temperature (Sensor) | -35°C to +180°C |
| Operating Temperature (CON021) | -35°C to +125°C |
| Pressure Resistance | Up to 20 bar |
| Thread Type | M10 x 1 metric |
| Cable Type | Coaxial, shielded |
| Cable Length | Standard: 5m / 7m / 9m / 10m (customizable) |
| Material (Sensor Body) | Stainless Steel |
| Ingress Protection | IP65 to IP68 (depending on installation) |
| Mounting Orientation | Axial or radial mounting |
| Compliance | API 670, CE |
| Shock Resistance | 100 g |
| Vibration Tolerance | Up to 20 g (peak) |
| Weight | 0.22 kg |
Applications
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Steam and Gas Turbines: Monitoring shaft axial and radial displacement, enabling early detection of thermal expansion, misalignment, and bearing wear.
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Compressors (Centrifugal, Axial, Reciprocating): Used to detect dynamic vibration and proximity for real-time diagnostics.
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Electric Motors and Generators: Suitable for continuous monitoring of rotor shaft movement, supporting predictive maintenance.
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Gearboxes: Monitors gear backlash, wear, and misalignment in high-load gear mechanisms.
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Industrial Pumps: Identifies cavitation, impeller imbalance, and mechanical misalignment issues.
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Fans and Blowers: Ensures dynamic stability and prevents catastrophic failure due to imbalance or looseness.
Product Advantages
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Non-contact Measurement: Avoids wear and allows for continuous long-term operation without degradation in accuracy.
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API 670 Compliance: Compatible with global protection systems used in petrochemical and power industries.
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High Thermal Resistance: Operational in extreme high-temperature environments without performance degradation.
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Factory Calibrated: Ensures plug-and-play performance with minimal setup.
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Modular Configuration: CON021 converter can be mounted remotely, allowing flexibility in installation layouts.
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EMI Shielding: Coaxial cable and sensor housing provide strong resistance to electromagnetic interference.
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Long Service Life: Designed for harsh environments with minimal maintenance requirements.
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Reliable Signal Transmission: Coaxial cabling ensures precise signal integrity over longer distances.
Frequently Asked Questions (FAQ)
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What is the primary application of the PR6423/00M-030 sensor?
It is used for measuring shaft displacement and vibration in rotating machinery such as turbines, pumps, motors, and compressors. -
Is the sensor compatible with Emerson’s VM600 system?
Yes, it is fully compatible with VM600 and other API 670-compliant monitoring platforms. -
What does the “030” calibration code signify?
It refers to the specific factory calibration range and material settings optimized for certain machine setups. -
Can this sensor be used in oil and gas facilities?
Absolutely. It is commonly used in refineries, offshore rigs, and petrochemical plants due to its robust build and certifications. -
Is recalibration needed on-site?
No, it comes factory calibrated, though field verification is recommended during commissioning. -
What’s the benefit of using the CON021 converter with this sensor?
It processes the raw signal and converts it into a linearized voltage output suitable for monitoring systems. -
Can the cable be extended?
Yes, but the total length must match the calibration configuration to maintain measurement accuracy. -
What is the difference between the PR6423/00M-030 and PR6423/002-030?
The difference lies in the mounting thread and specific calibration characteristics. “00M” denotes a metric thread, while other codes may use UNF or have different factory calibrations. -
How is the sensor mounted on the machine?
It is threaded into a mounting hole near the rotating shaft surface, either axially or radially. -
What maintenance is required?
Generally minimal—visual inspection during scheduled shutdowns and verification of signal quality are sufficient.
Recommended Models (Same Series or Functionally Related)
| Model | Description | Thread Type | Probe Tip | Use Case |
|---|---|---|---|---|
| PR6423/002-030+CON021 | Standard 8mm sensor with specific calibration | M10 x 1 | 8 mm | Motors, Compressors |
| PR6423/005-010+CON021 | Extended cable version for remote monitoring setups | 3/8″-24 UNF | 8 mm | Turbines, Gearboxes |
| PR6423/003-010+CON021 | Compact build for space-limited installations | M10 x 1 | 8 mm | Pumps, Compact Systems |
| PR6423/001-010-CN+CON021 | Chinese market variant with localized calibration | M10 x 1 | 8 mm | Domestic Industrial Sites |
| PR6423/10R-010+CON021 | Reinforced tip version for heavy-duty operation | M10 x 1 | 8 mm | Heavy Machinery |
| PR6423/004-010+CON021 | Optimized for low-speed rotating machinery | M10 x 1 | 8 mm | Gear Units, Fan Bearings |
Popular Epro (Emerson) Models
| Model | Description | Application | Component Type |
|---|---|---|---|
| MMS3120/022-100 | Machinery protection module with advanced diagnostics | Turbines, Compressors | Monitoring Module |
| MMS3110/022-000 | Compact monitoring module for rack-mounted systems | General Industrial Use | Monitoring Module |
| PR6424/014-040+CON021 | High-temperature eddy current sensor with ceramic tip | Gas Turbines | Eddy Current Sensor |
| CON041 | Universal converter for PR6423 and PR6424 series sensors | Signal Processing | Converter Module |
| PR6423/002-000+CON021 | Base model with flexible calibration options | Versatile Applications | Eddy Current Sensor |
| PR6423/00R-030+CON021 | OEM-calibrated version for custom installations | Custom Machinery | Eddy Current Sensor |
