Epro PR6423/00E-030 Eddy Current Displacement Sensor

Product Description

The PR6423/00E-030 from the EPRO portfolio of Emerson Electric is a compact 8 mm eddy-current probe designed for non-contact measurement of shaft dynamics in rotating equipment. It is engineered for continuous condition monitoring in demanding industrial environments, delivering stable and repeatable measurements of vibration, position, and shaft behavior.

This probe operates in conjunction with EPRO signal converters such as the CON021, forming a complete measurement chain compliant with API 670 standards. Its rugged construction and high-temperature capability ensure reliable performance in applications exposed to oil, contamination, and thermal stress.

Functional Overview

• Non-contact eddy-current sensing for wear-free operation

• High-resolution measurement of shaft displacement and vibration

• Stable signal output when integrated with CON021 converter

• Designed for turbomachinery protection and monitoring systems

• Suitable for hazardous and high-temperature installations

Technical Specifications

General Characteristics

• Model: PR6423/00E-030

• Sensor Type: Eddy current displacement and vibration probe

• Probe Diameter: 8 mm

• Origin: Germany / USA

• Compatible Converter: CON021

Measurement Performance

• Measurement Range: 0 to 2 mm (linear calibrated range)

• Initial Installation Gap: Approx. 0.5 mm

• Sensitivity (ISF): 8 V/mm ±5%

• Linearity Deviation: ≤ 1.0%

• Deviation from Best-Fit Curve: ±0.025 mm

• Minimum Shaft Diameter: ≥ 25 mm

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

• Frequency Response: DC to 10 kHz

Electrical Characteristics

• Output Signal:

• Dynamic voltage signal via CON021

• Optional 4–20 mA output depending on system configuration

• Supply Voltage: Provided by signal converter (–23 V to –32 V DC typical)

Environmental Conditions

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

• Cable Temperature Range: –35 °C to +150 °C

• Protection Rating: IP66

• Materials:

• Tip: PEEK (high-temperature resistant polymer)

• Housing: Stainless steel

• Cable: PTFE insulation

• Connector: Nickel-plated brass

Compliance and Certifications

• CE (EMC, RoHS)

• ATEX (intrinsically safe / non-sparking configurations)

• IECEx

• CSA (North America hazardous locations)

Application Areas

The PR6423/00E-030 probe is used in monitoring and protection systems for rotating machinery, including:

• Steam, gas, and hydro turbines

• Centrifugal compressors

• Industrial pumps and fans

• Gearboxes and transmission systems

• High-speed rotating equipment requiring API 670 compliance

FAQ

Q: What system components are required for operation?
A: The probe must be connected to a compatible EPRO converter such as CON021 to produce a usable output signal.

Q: What parameters can this sensor measure?
A: It measures shaft radial vibration, axial displacement, eccentricity, and can support speed/keyphasor detection in monitoring systems.

Q: Is the sensor suitable for high-temperature environments?
A: Yes, the probe tip supports temperatures up to +180 °C, with a high-temperature-resistant cable design.

Q: What distinguishes this model from other PR6423 variants?
A: The PR6423/00E-030 offers a standard 2 mm measurement range with high sensitivity (8 V/mm), making it suitable for precise displacement monitoring in compact installations.