1. Product Overview
The EPRO PR6423/000-000 is a high-performance 8mm eddy current sensor purpose-built for non-contact measurement of vibration, axial displacement and rotational position on critical rotating equipment such as steam turbines, centrifugal compressors and industrial gas turbines. Manufactured by Emerson, it is natively compatible with EPRO MMS monitoring systems and CON011/CON021/CON031/CON041 signal converters, and carries ATEX hazardous area certification for safe deployment in flammable industrial zones. It is a widely deployed core sensing component in heavy industrial machinery protection systems across power generation, petrochemical and metallurgy sectors.
2. Core Technical Specifications
- Manufacturer: EPRO (Emerson)
- Official Part Number: PR6423/000-000
- Product Type: 8mm Eddy Current Sensor
- Measurement Range: 0 to 3 mm (0 to 0.12 in)
- Sensitivity: 7.87 V/mm (200 mV/mil)
- Probe Diameter: 5 mm
- Output Voltage: -2 VDC to -18 VDC
- Frequency Response: 0 to 10 kHz
- Linearity Error: ±1% of full-scale range
- Power Supply Voltage: -24 VDC
- Probe Tip Material: PEEK
- Operating Temperature Range: -35 °C to +180 °C, short-term excursions up to +200 °C
- Standard Armored Cable Length: 5 m, optional lengths from 4–10 m
- Protection Class: IP67
- Net Weight: Approx. 0.3 kg
- Hazardous Area Certification: ATEX certified
- Warranty: 12 months standard for new units
3. Key Features & Advantages
- Ultra-Wide Temperature Tolerance: The -35 °C to +180 °C continuous operating range with 200 °C short-term tolerance allows direct installation near high-temperature turbine casings, eliminating the need for complex external cooling accessories.
- High-Precision Measurement Performance: The 7.87 V/mm calibrated sensitivity and ±1% full-scale linearity error deliver highly accurate and stable gap measurement results, meeting the strict precision requirements of turbomachinery protection systems.
- Rugged Industrial Design: The IP67-rated probe body and fully shielded armored cable provide excellent resistance to oil, water, dust and electromagnetic interference, ensuring reliable 24/7 operation in harsh industrial environments.
- Full System Compatibility: Natively integrates with EPRO MMS series monitoring systems and CON011/CON021/CON031/CON041 signal converters, no additional signal conversion accessories are required for direct drop-in replacement.
- Hazardous Area Safety Compliance: The official ATEX certification fully meets the explosion protection requirements of flammable industrial zones, supporting safe deployment in petrochemical, offshore oil & gas and other high-risk process scenarios.
4. Typical Applications & Real-World Value
This eddy current sensor is a mission-critical monitoring component widely deployed in power generation, petrochemical and other heavy industrial facilities, delivering tangible operational and safety benefits.
- In large thermal power plant steam turbine units, it continuously monitors shaft radial vibration and thrust position, detecting early abnormal wear signs of the rotor and bearings to prevent unplanned turbine trips caused by sudden mechanical failures.
- In refinery large centrifugal compressor units, its high-temperature resistance allows installation directly on the high-temperature compressor casing, providing stable vibration data for the machinery protection system to avoid catastrophic equipment damage during high-load operation.
- For maintenance teams operating existing EPRO MMS monitoring systems, the pre-calibrated sensor can be installed and put into operation quickly, eliminating the risk of measurement errors caused by mismatched sensor components and reducing on-site troubleshooting workload.
- For offshore oil & gas platform rotating equipment monitoring scenarios, the ATEX hazardous area certification ensures the sensor meets strict explosion protection requirements, supporting safe and reliable continuous operation in flammable and explosive offshore environments.
