Epro CON021+PR6423/003-040 Eddy Current System

Product Description

The CON021 + PR6423/003-040 is a matched eddy current measurement assembly from Emerson EPRO designed for continuous shaft vibration and displacement monitoring in high-speed rotating machinery. The system pairs an 8 mm proximity probe with a dedicated signal conditioning unit to ensure stable signal conversion under demanding mechanical and thermal conditions.

It is widely implemented in turbine trains, compressors, pumps, and gearbox systems where accurate rotor behavior analysis is required for condition-based maintenance and protection strategies.

Technical Specifications

Probe Unit: PR6423/003-040
Model: PR6423/003-040
Sensor Type: Eddy Current Proximity / Displacement Probe
Probe Diameter: 8 mm

Measurement Performance

• Linear Measurement Range: 2 mm (80 mils nominal)

• Installation Air Gap: ~0.5 mm

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

• Linearity Accuracy: ±0.025 mm within calibrated operating range

• Minimum Shaft Diameter: ≥25 mm

• Target Material: Ferromagnetic steel (AISI 4140 / 42CrMo4 or equivalent)

Environmental Performance

• Operating Temperature Range: −35 °C to +180 °C

• Protection Class: IP66 (IEC 60529 compliant)

• Designed for continuous operation in harsh turbine and compressor environments

• Resistant to dust ingress and high-pressure water exposure

Signal Converter: CON021
Model: CON021

• Frequency response: 0–20 kHz (−3 dB)

• Signal rise time: <15 µs

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

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

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

• Protection rating: IP65

• Weight: 0.6 kg

• Rack or enclosure mounting via screw interface

System Functionality

• Non-contact eddy current measurement for shaft dynamics analysis

• Continuous monitoring of vibration, displacement, and eccentricity

• Stable analog-to-system signal conversion with matched calibration

• Suitable for integration into machinery protection and monitoring architectures

• High-frequency response for transient and dynamic rotor behavior

Application Areas

• Steam and gas turbine vibration monitoring

• Compressor shaft displacement measurement

• Pump and gearbox condition diagnostics

• Rotor eccentricity and alignment tracking

• Predictive maintenance in rotating equipment systems

Engineering Notes

• Full system accuracy depends on correct probe-converter pairing

• Ferromagnetic target material is required for proper eddy current operation

• Calibration reference applies within 0–45 °C; drift may occur outside range

• Proper grounding and shielding are required to ensure signal stability

• Installation geometry directly affects measurement repeatability

FAQ

Q1: Can the PR6423/003-040 operate without CON021?
No. The probe requires the CON021 converter for excitation and signal processing.

Q2: Is this system suitable for high-speed turbines?
Yes. It is designed for high-frequency vibration monitoring in rotating machinery.

Q3: Does installation affect accuracy?
Yes. Mechanical alignment, shaft material, and mounting rigidity directly influence measurement precision.