Epro CON021+PR6426/010-130 Eddy Current Displacement Sensor System

Product Description

The PR6426/010-130 + CON021 configuration from Emerson Epro is developed for high-accuracy, non-contact monitoring of shaft dynamics in large rotating machinery. This system integrates a 32 mm eddy-current probe with a signal conditioning module to deliver precise measurements of shaft vibration, radial position, and axial displacement.

The probe is optimized for large-diameter shafts, offering an extended measurement range, while the CON021 converter ensures stable signal processing with wide bandwidth and strong electromagnetic compatibility. The system is widely implemented in turbomachinery where continuous condition monitoring and protection are critical.

Key System Advantages

• Non-contact measurement eliminates probe wear and mechanical influence

• Extended measurement range tailored for large shaft diameters

• High-temperature probe design for demanding operating environments

• Wide-frequency signal conditioning suitable for high-speed applications

• Pre-calibrated system simplifies commissioning and reduces setup time

Technical Specifications

Eddy-Current Probe: PR6426/010-130

• Model: PR6426/010-130

• Sensor Type: Eddy-current proximity probe

• Probe Diameter: 32 mm

Measurement Characteristics

• Static Measuring Range: ±4.0 mm (typical system range)

• Recommended Shaft Diameter: ≥ 200 mm

• Measurement Principle: Non-contact electromagnetic sensing

Mechanical & Material Data

• Housing Material: Stainless steel

• Tip Material: PPS (high-temperature resistant polymer)

• Cable Length: Approx. 13 m (factory configured for this variant)

Environmental Performance

• Operating Temperature: –35°C to +180°C

• Designed for high-temperature and harsh industrial conditions

Signal Converter: CON021

• Model: CON021

• Compatible Probe Series: PR6422, PR6423, PR6424, PR6426

Dynamic Performance

• Frequency Response: 0 to 20 kHz (–3 dB)

• Signal Rise Time: < 15 µs

Output Signals

• Configurable analog output:

• –4 V to –20 V DC

• –2 V to –18 V DC

Power Requirements

• Supply Voltage Range:

• –23 V to –32 V DC (standard range)

• –21 V to –32 V DC (alternative configuration)

Environmental and Mechanical Data

• Operating Temperature: –30°C to +100°C

• Shock Resistance: 5 g at 60 Hz (25°C reference)

• Protection Rating: IP20 (control cabinet installation)

Electrical Connections

• Sensor Interface: LEMO self-locking connector

• Output/Power: Screw terminal connections

Certifications

• CE compliant

• Hazardous area approvals available (ATEX, IECEx, CSA depending on configuration)

System Capabilities

• Continuous monitoring of shaft vibration and position

• Measurement of axial and radial displacement

• Detection of eccentricity and early-stage mechanical faults

• Integration with PLC, DCS, and machinery protection systems

• Suitable for predictive maintenance strategies

Application Areas

• Steam turbines and gas turbines

• Large compressors

• Industrial pumps

• High-power rotating equipment in energy and process industries

FAQ

Q: Is recalibration required after installation?
A: The PR6426/010-130 + CON021 system is factory-matched and calibrated. Only mechanical gap adjustment is typically required during commissioning.

Q: What makes this probe suitable for large machinery?
A: Its 32 mm diameter and extended ±4 mm measuring range allow accurate monitoring of large shafts with higher displacement amplitudes.

Q: Can the system operate in high-temperature environments?
A: Yes, the probe is rated up to +180°C, making it suitable for turbine and compressor applications.