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Product Introduction
The Epro PR6423/10R-040+CON021 is a high-performance, non-contact eddy current proximity sensor system designed for critical vibration and displacement monitoring applications. It belongs to the PR6423 series of proximity probes developed by Epro (a brand of Brüel & Kjær Vibro), and features an 8mm tip diameter suitable for standard industrial installations.
Paired with the CON021 converter module, the PR6423/10R-040 probe becomes a complete measurement chain that is compatible with a wide range of machinery protection systems, including those from Epro MMS6000, MMS3000, and third-party monitoring systems. The sensor is capable of precise shaft vibration, axial position, and radial runout measurement in harsh industrial environments such as gas turbines, compressors, motors, and gearboxes.
The PR6423 series is known for its durability, precision, and flexibility in harsh environments. The 10R version, specifically, offers optimized performance for racked systems and delivers high linearity and accuracy even under extreme temperature, humidity, and electromagnetic interference conditions.
Product Specifications
| Parameter | Details |
|---|---|
| Product Name | PR6423/10R-040 + CON021 |
| Manufacturer | Epro / Brüel & Kjær Vibro |
| Sensor Type | Eddy Current Proximity Probe |
| Sensor Head Diameter | 8 mm |
| Sensing Range | 0.25 mm to 2.0 mm (typical) |
| Frequency Range | 0 – 10 kHz |
| Linear Range | Up to 2 mm (dependent on target material and system) |
| Sensitivity | Approx. 7.87 mV/μm (with CON021 and standard target) |
| Target Material | Conductive metals (typically AISI 4140 steel) |
| Probe Material | Stainless steel body with PEEK insulated tip |
| Connector Type | Integrated with CON021 (2-pin/3-pin connection depending on model) |
| Operating Temperature | -35°C to +180°C (probe); -35°C to +85°C (CON021) |
| Environmental Protection | IP68 (sensor), IP65 (CON021 enclosure) |
| System Compatibility | Epro MMS6000 / MMS3000 / VC-8000 and other vibration monitors |
| Certifications | CE, ATEX II 2G Ex ib IIC T4/T6 Gb (with certified CON021) |
| Weight | 0.22 kg |
Product Applications
The Epro PR6423/10R-040+CON021 eddy current sensor system is designed for a wide range of industrial applications that demand high reliability and real-time monitoring of shaft dynamics. Typical applications include:
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Turbomachinery Monitoring: Gas and steam turbines require precise vibration and position monitoring to prevent critical failures.
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Compressor Systems: Detects radial and axial displacement to ensure optimal compressor shaft alignment and performance.
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Motors and Generators: Ideal for monitoring vibration levels and shaft positioning to avoid unplanned downtimes.
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Gearboxes: Detects early signs of misalignment, shaft bending, or bearing degradation.
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Pumps and Fans: Useful in predictive maintenance strategies by identifying cavitation, imbalance, or wear.
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OEM Integration: Incorporated in custom-built equipment for condition-based monitoring and protection.
Product Advantages
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High Accuracy and Linearity: Offers excellent measurement fidelity across a wide temperature and mechanical range.
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Robust Mechanical Design: Stainless steel housing and PEEK insulation ensure long service life in corrosive and high-temperature environments.
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Wide Compatibility: Functions seamlessly with existing Epro and third-party monitoring systems.
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Compact and Versatile: The 8mm probe allows installation in tight spaces without compromising performance.
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Certified for Hazardous Areas: ATEX-compliant version ensures safe use in explosive environments.
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Interchangeability: Modular design allows easy replacement of probes and converters without full system recalibration.
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Low Maintenance: Non-contact measurement eliminates mechanical wear, ensuring long operational life.
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High IP Rating: Suitable for submersed or dusty applications due to IP68 sensor head protection.
Frequently Asked Questions (FAQ)
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Q: What is the sensing range of the PR6423/10R-040?
A: The typical linear range is up to 2.0 mm, depending on the target material and system configuration. -
Q: Can this sensor be used in ATEX zones?
A: Yes, the sensor + CON021 combo is ATEX-certified for Zone 1 use when installed correctly. -
Q: Is this sensor compatible with non-Epro monitoring systems?
A: Yes, the output signal from CON021 is standard and can be integrated into many third-party monitoring systems. -
Q: What type of material is required for the target surface?
A: The system is designed to work best with conductive materials like AISI 4140 steel. -
Q: How is the sensor mounted?
A: Typically installed via threaded mounting (M10 × 1 or similar) into the machine casing or sensor bracket. -
Q: Does this sensor require calibration?
A: Calibration is factory-set; however, system validation is recommended after installation. -
Q: Can the cable length be extended?
A: Yes, but it is important to match the total system configuration with the proper CON021 to maintain signal integrity. -
Q: What environmental conditions can it operate under?
A: The probe operates from -35°C to +180°C and offers IP68 protection for submerged environments. -
Q: Is it suitable for axial and radial measurements?
A: Yes, depending on installation geometry, the sensor can measure both axial thrust and radial vibration. -
Q: What tools are needed for installation?
A: Typically a torque wrench, mounting sleeve, and vibration-safe wiring practices are required.
Related or Same-Series Models
| Model | Description | Cable Length | Tip Diameter |
|---|---|---|---|
| PR6423/000-000+CON011 | Standard 5mm probe with CON011 converter | 5 m | 5 mm |
| PR6423/002-030+CON021 | 5 mm probe, 3 m cable, ATEX certified | 3 m | 5 mm |
| PR6423/003-010+CON021 | 5 mm probe, 1 m cable, high-temperature version | 1 m | 5 mm |
| PR6423/004-010+CON021 | 5 mm probe, 1 m, axial application optimized | 1 m | 5 mm |
| PR6423/005-010+CON021 | 5 mm probe, reinforced cable and shielding | 1 m | 5 mm |
| PR6423/102-000+CON021 | 8 mm probe, 2 m cable, redundant sensing option | 2 m | 8 mm |
Popular Epro Models
| Model | Description | Application | Output Signal |
|---|---|---|---|
| MMS3120/022-100 | Monitoring module for vibration and speed | Machinery protection | 4–20 mA / Relay |
| MMS3110/022-000 | Vibration monitoring module | General vibration measurement | 0–10 V / Relay |
| CON011 | Eddy current converter module | Works with PR6423 series | ±20 V, 4–20 mA |
| PR6424/01CS | Compact sensor with high temperature rating | Turbine vibration | With CON modules |
| PR9268/301-000 | Velocity sensor (piezoelectric) | Rolling element bearing | 4–20 mA |
| MMS6110/022-100 | Dual-channel monitoring unit | Speed and position monitoring | 0–10 V / Relay |
