Emerson EPRO PR6423/010-030 Eddy Current Sensor

Emerson EPRO PR6423/010-030 Eddy Current Sensor is a high-performance, non-contact proximity probe engineered for continuous, accurate measurement of shaft vibration, axial position, eccentricity, and speed in the most demanding industrial environments. As a core component of Emerson's (formerly EPRO) condition monitoring portfolio, this 8mm sensor is the industry-standard choice for protecting steam turbines, gas turbines, compressors, pumps, and gearboxes .

What is the Emerson PR6423/010-030?

The PR6423/010-030 is a factory-calibrated eddy current displacement sensor featuring a 3-meter (approximately 10 feet) PTFE-insulated cable terminated with a Lemo connector. It is designed for use with the CON021 signal converter, together forming a complete measurement system that delivers high-fidelity shaft data to machinery protection platforms like the Emerson AMS 6500, MMS 6000, and MMS 3000 series .

This sensor utilizes advanced eddy current technology to detect the position of a ferromagnetic shaft without physical contact. By generating a high-frequency magnetic field, it measures the gap to the target surface and produces a voltage output directly proportional to displacement. The /010-030 suffix in the model number specifies a particular combination of thread configuration and cable length, ensuring proper fit and signal integrity for installations where the sensor must be located at a moderate distance from the signal converter .

Key Technical Specifications (Specs)

PR6423/010-030 Sensor Performance

Manufacturer: Emerson (EPRO) 

Series: PR6423 

Sensor Type: Eddy Current Displacement Sensor 

Tip Diameter: 8 mm 

Linear Measurement Range: 2.0 mm (80 mils) 

Recommended Initial Air Gap: 0.5 mm (20 mils) 

Incremental Scale Factor: 8 V/mm (203.2 mV/mil) ±5% @ 0-45°C 

Linearity Deviation: ±0.025 mm (±1 mil) best-fit straight line @ 0-45°C 

Frequency Response: 0 – 10 kHz (typical, dependent on target) 

Target Requirements: Ferromagnetic steel (e.g., 42CrMo4, AISI 4140), minimum 25mm diameter 

Environmental & Mechanical Specifications

Operating Temperature (Sensor): -35°C to +180°C (-31°F to 356°F) 

Operating Temperature (Cable): Rated to 150°C (302°F) 

Ingress Protection (Sensor): IP66 – Dust-tight and protected against high-pressure water jets 

Sensor Housing: Stainless steel for corrosion resistance 

Sensor Tip Material: PEEK (Polyether Ether Ketone) for exceptional thermal and chemical resistance 

Cable Insulation: PTFE (Teflon) 

Cable Length: 3 meters (specified by -030 suffix) 

Connector: Self-locking Lemo type, prevents loosening under vibration 

Thread Size: M10x1 (standard for PR6423 series)