Epro CON021+PR6423/10R-010 Eddy Current Sensor System

Product Description

The combined PR6423/10R-010 + CON021 system from the EPRO range of Emerson Electric is a precision eddy-current measurement solution developed for continuous monitoring of shaft dynamics in rotating machinery. This integrated setup consists of a non-contact probe and a dedicated signal converter, delivering stable and accurate displacement and vibration signals for industrial control and protection systems.

The probe detects minute variations in the distance to a conductive surface, while the CON021 converter conditions this signal into a calibrated voltage output suitable for DCS, PLC, and condition monitoring platforms. The system is widely implemented in API 670-aligned protection schemes where reliability and signal integrity are critical.

System Functional Description

• Non-contact sensing avoids mechanical wear and drift

• Combined DC and AC signal output enables both position and vibration analysis

• Fast signal processing ensures accurate dynamic response

• Designed for integration with turbomachinery protection and monitoring systems

• Suitable for hazardous and high-temperature environments when properly installed

Technical Specifications

System Overview

• Probe Model: PR6423/10R-010

• Converter Model: CON021

• Measurement Principle: Eddy current displacement and vibration sensing

• Origin: Germany

• Compliance: API 670, ATEX, IECEx, CSA, CE

PR6423/10R-010 Probe Parameters

• Sensor Type: Non-contact eddy current probe

• Tip Diameter: 8 mm

• Standard Measurement Range: 0 to 2 mm

• Sensitivity: Approx. 7.87 mV/µm

• Frequency Range: DC to 10 kHz

• Operating Temperature (probe tip): –35 °C to +180 °C

• Pressure Resistance: Up to 20 bar

• Mounting Thread: M10 × 1

• Protection Rating: IP65 to IP68 (installation dependent)

• Mechanical Resistance:

• Shock: up to 100 g

• Vibration: up to 20 g peak

• Cable: Shielded coaxial cable, typical lengths 5–10 m

CON021 Signal Converter Parameters

• Function: Signal conditioning and conversion to voltage output

• Bandwidth: 0 to 20 kHz (–3 dB)

• Response Time: < 15 µs

• Supply Voltage Options:

• –23 V to –32 V DC (output –4 to –20 V)

• –21 V to –32 V DC (output –2 to –18 V)

• Linearity Error: ≤ 1.0%

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

• Enclosure Material: Aluminum alloy (LMgSi 0.5 F22)

• Protection Class: IP20
  

• Electrical Connections:

• Sensor interface: LEMO connector

• Output/power: screw terminals (≤1.5 mm²)

Integrated System Performance

• Output Signal: Analog DC voltage with superimposed AC vibration component

• Output Range: Typically –4 to –20 V

• Measurement Capabilities:

• Radial shaft vibration

• Axial displacement

• Shaft eccentricity

• Keyphasor / speed reference detection

• System Accuracy: ±0.1% of full scale

• Recommended Probe-to-Converter Distance: ≤ 5 m

• Environmental Protection: Sensor suitable for oil, dust, and moisture exposure (IP67 typical)

Mechanical and Logistics Data

• Dimensions: 240 × 170 × 60 mm

• Weight: 0.66 kg

Application Areas

The PR6423/10R-010 + CON021 system is typically deployed in high-value rotating equipment where precise condition monitoring is required:

• Steam and gas turbines

• Centrifugal compressors

• Industrial pumps and fans

• Electric motors and generators

• Gear units and high-speed transmission systems

FAQ

Q: What is the role of the CON021 converter?
A: It converts the raw eddy-current signal from the probe into a stable analog voltage output suitable for monitoring and control systems.

Q: Can the system measure both vibration and position?
A: Yes, the DC component represents displacement, while the superimposed AC signal reflects vibration.

Q: Is this system compliant with industry standards?
A: It is designed for use in systems meeting API 670 requirements and supports hazardous-area certifications depending on configuration.

Q: What is the maximum cable length allowed?
A: For optimal signal quality, a probe-to-converter distance of up to 5 meters is recommended.