Epro CON021+PR6423/10R-040-HT Eddy Current System

Product Description

The CON021 + PR6423/10R-040-HT from Emerson EPRO is a high-temperature eddy current measurement assembly engineered for continuous monitoring of rotor dynamics in severe thermal environments. It integrates a rugged 8 mm proximity probe with a matched signal conditioning unit to provide stable vibration and shaft displacement feedback in critical rotating machinery.

This configuration is commonly implemented in turbine sections and other high-heat mechanical zones where conventional proximity systems cannot maintain calibration stability.

Technical Specifications

Probe Unit: PR6423/10R-040-HT
Model: PR6423/10R-040-HT
Sensor Type: Eddy Current Proximity / Displacement Probe
Probe Diameter: 8 mm

Measurement Characteristics

• Linear Measuring Range: 2 mm (80 mils nominal window)

• Installation Air Gap: ~0.5 mm

• Sensitivity: 8 V/mm ±5% (calibrated at 0–45 °C reference condition)

• Linearity Deviation: ±0.025 mm within calibrated range

• Minimum Shaft Diameter: ≥25 mm

• Target Material Requirement: Ferromagnetic steel (e.g., 42CrMo4 / AISI 4140 equivalent)

Thermal & Environmental Performance

• Operating Temperature Range: −35 °C to +220 °C (extended high-temperature design)

• Protection Class: IP66 (IEC 60529 compliant)

• Designed for long-duration operation in high-heat turbine zones

• Resistant to dust ingress and high-pressure water jets

Converter Unit: CON021
Model: CON021

• Signal bandwidth: 0–20 kHz (−3 dB)

• Response time: <15 µs rise time

• Supply voltage: −23 V to −32 V DC (dual output scaling options supported)

• Output signal ranges: −4 V to −20 V or −2 V to −18 V

• Housing material: Die-cast aluminum alloy (GD-AlSi9Cu3)

• Protection rating: IP65

• Weight: 0.6 kg

• Industrial screw-mount enclosure design

System Performance Characteristics

• Non-contact sensing architecture eliminates mechanical wear

• Stable analog signal transmission for continuous condition monitoring

• High-frequency response suitable for dynamic rotor vibration analysis

• Designed for matched calibration between probe and converter unit

• Suitable for integration into machinery protection and monitoring systems

Application Areas

• High-temperature gas and steam turbine monitoring

• Compressor rotor vibration and clearance measurement

• Pump and gearbox shaft displacement tracking

• Thermal-zone eccentricity detection in rotating equipment

• Predictive maintenance systems for critical rotating assets

Engineering Considerations

• Full performance depends on proper probe-converter calibration pairing

• High-temperature variant designed for environments up to 220 °C continuous exposure

• Ferromagnetic target material is required for eddy current coupling

• Shielded cabling and correct grounding are essential to minimize electrical noise

• Accuracy reference applies within standard calibration temperature range (0–45 °C)

FAQ

Q1: What differentiates the HT version from standard PR6423 probes?
The HT variant is engineered for extended thermal endurance, allowing operation up to 220 °C.

Q2: Is the system suitable for continuous turbine operation?
Yes, it is designed for continuous-duty monitoring in high-temperature rotating machinery.

Q3: Can the CON021 be replaced with another converter?
Only compatible EPRO eddy current converters should be used to maintain calibration integrity.