Emerson PR6424/014-120 16mm Eddy-Current Contactless Sensor

Emerson PR6424/014-120 CON021 is a high-performance 16mm eddy current sensor system designed for non-contact displacement and vibration measurement in demanding industrial environments. As part of Emerson's renowned EPRO product line, this advanced sensor module combines rugged construction with precision measurement technology to deliver reliable performance for critical rotating machinery monitoring applications .

The PR6424/014-120 operates on proven eddy current principles: a high-frequency alternating current generates a magnetic field at the sensor tip, inducing eddy currents in conductive target materials (typically rotating shafts). The CON021 signal converter detects impedance changes and outputs a DC voltage directly proportional to the gap distance, enabling precise measurement of static position and dynamic vibration .

Engineered for integration with EPRO PLC systems and compatible with major machinery protection platforms, this sensor excels in applications including steam turbine monitoring, gas turbine protection, centrifugal compressor thrust measurement, and large pump vibration analysis . Its 16mm sensor head is specifically optimized for shafts with diameters of 80mm and above, making it ideal for large turbomachinery in power generation, oil and gas, petrochemical, and heavy industrial facilities .

The module features a lightweight yet robust construction weighing only 200 grams, facilitating easy installation and integration into existing equipment without adding unnecessary bulk . Its compact design and rugged construction ensure reliable performance under harsh conditions, with advanced signal processing technology delivering precise and consistent results across wide operating ranges .

Key Technical Specifications

Parameter Specification

Product Type Eddy Current Sensor / Industrial Control Module 

Sensor Head Diameter 16 mm

Linearity 4 V/mm (101.6 mV/mil) ≤ ±1.5% 

Air Gap (Center) Approximately 2.7 mm 

Static Measurement Range ±2.0 mm 

Dynamic Measurement Range 0 to 1,000 μm 

Resolution 1 μm (high-resolution encoder) 

Output Frequency 50 kHz  or 120 kHz (conflicting data, verify with manufacturer) 

Operating Voltage 220 V 

Operating Temperature -40°C to +85°C 

Communication Interface RS485 

Material Dielectric Polymer / Advanced composites 

Weight Approximately 200 grams 

Compatibility EPRO PLC systems, industrial control platforms 

Country of Origin Germany 

Measurement Accuracy ±0.05% (claimed)