Emerson PR6424/000-030 16mm Eddy-Current Contactless Sensor

Emerson PR6424/000-030 16mm Eddy-Current Contactless Sensor represents the gold standard in non-contact displacement measurement for heavy-duty rotating machinery. Manufactured by EPRO (now part of Emerson), this high-performance sensor is specifically engineered to monitor the health and performance of critical turbomachinery including steam turbines, gas turbines, hydro turbines, compressors, pumps, and fans in power generation, oil and gas, and industrial processing environments.

Exceptional Measurement Capabilities for Large Shaft Applications

The PR6424/000-030 features a robust 16mm sensor design purpose-built for shafts with diameters of 80mm and larger, delivering superior electromagnetic field penetration and measurement stability that smaller 8mm sensors cannot achieve . This sensor provides a sensitivity of 4 V/mm (101.6 mV/mil) with ±1.5% linearity, ensuring precise measurement of both radial and axial shaft dynamic displacement, position, eccentricity, and speed/key phasor.

Key technical specifications include:

Static Measurement Range: ±2.0 mm (±79 mils) for position tracking and thermal growth monitoring

Dynamic Measurement Range: 0 to 1,000 μm (0 to 39 mils) for vibration amplitude measurement

Nominal Air Gap: Approximately 2.7 mm (106 mils) center point for optimal linearity

Long-Term Stability: <0.3% drift for reliable continuous monitoring

Temperature Coefficient: <4% per 100°K, meeting stringent API 670 requirements 

Built for Extreme Industrial Environments

The PR6424/000-030 excels in harsh operating conditions where reliability is paramount. With an operating temperature range of -35°C to +150°C (-31°F to +302°F) and pressure resistance up to 10,000 hPa (145 psi) at the sensor head, it withstands the thermal transients and pressurized environments common in turbomachinery applications.

The sensor's industrial-grade construction features a stainless steel sleeve for maximum corrosion resistance and mechanical strength, while the PTFE (Polytetrafluoroethylene) cable insulation maintains signal integrity at elevated temperatures. The sensor also withstands 5g vibration at 60 Hz, ensuring reliable operation even under severe machinery vibration.

Complete Measurement System Integration

The PR6424/000-030 is typically paired with the CON021 signal converter, creating a factory-matched system that delivers exceptional measurement accuracy. The CON021 provides:

Frequency response: DC to 20,000 Hz (-3dB) capturing both static position and dynamic vibration

Rise time: <15 microseconds for fast transient capture

Output voltage: -4V to -20V or -2V to -18V proportional to gap distance 

This system integrates seamlessly with major machinery protection platforms including Bently Nevada 3500, Emerson AMS 6500, Siemens S7-1500 PLCs, and various DCS platforms such as Emerson DeltaV, Honeywell Experion PKS, and ABB 800xA.