Emerson PR6424/000-131 16mm Eddy-Current Contactless Sensor

Emerson PR6424/000-131 is a high-performance eddy-current contactless sensor engineered for continuous monitoring of critical rotating machinery. As part of Emerson"s extensive portfolio of proximity transducers, this 16mm sensor is specifically designed to provide precise vibration and displacement measurements on large shafts (≥80mm diameter), making it an essential component for predictive maintenance and machine protection systems in power generation, oil & gas, and heavy industrial applications .

How the Eddy Current Principle Works

Like other advanced eddy current probes, the PR6424/000-131 operates on the principle of electromagnetic induction . The sensor generates a high-frequency magnetic field. When a conductive target (such as a rotating shaft) approaches this field, eddy currents are induced on the target surface. This interaction changes the impedance of the sensor's coil, which is then converted into a linear voltage signal proportional to the gap between the sensor tip and the shaft . This non-contact measurement method eliminates mechanical wear and provides high-fidelity data without interfering with the rotating assembly.

Key Technical Specifications

The Emerson PR6424/000-131 offers exceptional linearity and stability under extreme conditions. Below are the critical performance parameters based on manufacturer data:

Sensitivity/Linearity: 4 V/mm (101.6 mV/mil) ±1.5% maximum 

Center Air Gap: Approximately 2.7 mm (0.11 inches) nominal 

Static Measurement Range: ±2.0 mm (0.079 inches) 

Dynamic Measurement Range: 0 to 1,000 µm (0 to 0.039 inches) 

Shaft Diameter Requirement: ≥80 mm 

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

For industries requiring high-accuracy, non-contact measurement on large rotating shafts, the Emerson PR6424/000-131 16mm eddy-current sensor delivers proven performance. Its robust design, precise linearity, and environmental resistance make it the industry standard for vibration and position monitoring in the most demanding applications.