Emerson PR6424/000-010 16mm Eddy-Current Contactless Sensor

Emerson PR6424/000-010 is a high-precision, non-contact eddy current sensor designed for critical machinery protection and condition monitoring applications. As part of Emerson's renowned EPRO product line, this 16mm sensor represents the industry standard for measuring radial and axial shaft displacement, vibration, eccentricity, and rotational speed on large rotating equipment .

Engineered specifically for API 670-compliant machinery protection systems, the PR6424/000-010 excels in demanding environments such as steam turbines, gas turbines, hydroelectric generators, centrifugal compressors, large pumps, and industrial fans . With compliance to DIN 45670 and ISO 10817-1 standards, this sensor ensures reliable performance in the most challenging industrial settings .

How Eddy Current Technology Works

The PR6424/000-010 operates on fundamental physical principles: when a high-frequency alternating current passes through the sensor tip, it generates a magnetic field. When a conductive target (the rotating shaft) enters this field, eddy currents are induced, altering the impedance of the probe coil . The CON021 signal converter detects this impedance change and outputs a DC voltage directly proportional to the gap distance.

This non-contact measurement method provides:

Wear-free operation with unlimited mechanical life

Sub-micron resolution for detecting minute changes

DC response capturing both static position and dynamic vibration

Key Technical Specifications

Sensor Specifications (PR6424/000-010)

Parameter Value

Manufacturer Emerson (EPRO) 

Model Number PR6424/000-010 

Product Type 16mm Eddy Current Contactless Sensor 

Sensor Head Diameter 16 mm 

Sensing Technology Non-contact eddy current induction 

Air Gap (Center) Approximately 2.7 mm 

Sensitivity 4 V/mm with ±1.5% linearity across full range 

Measurement Range 0-1,000 µm displacement 

Static Measurement Range ±2.0 mm displacement 

Minimum Target Shaft Diameter Optimized for shafts ≥80mm diameter 

Frequency Response DC to 20 kHz (-3 dB) 

Rise Time <15 µs 

Operating Temperature (Sensor) -35°C to +100°C 

Protection Rating IP68 (probe) / IP20 (converter) 

Housing Material Stainless Steel 

Cable Insulation PTFE (Polyether Ether Ketone) 

Connector Lemo self-locking connector 

System Weight 0.8 kg complete kit 

Compliance API 670, ATEX Zone 1, CE, UL certified, DIN 45670, ISO 10817-1 

CON021 Signal Converter Specifications

Parameter Value

Converter Model CON021/916-100 

Output Signals 4-20 mA / 0-10 V DC (field-configurable) 

Operating Temperature (Converter) -30°C to +100°C 

Cable Configuration 1-10m armored PTFE with Lemo connector