Emerson PR6423/014-110 Eddy Current Sensor Precision Shaft Monitoring

The Emerson PR6423/014-110 is a high-precision, non-contact eddy current displacement sensor designed for critical turbomachinery monitoring applications . Part of the renowned EPRO PR6423 series manufactured by Emerson Process Management, this sensor represents the gold standard for measuring shaft vibration, axial displacement, eccentricity, and keyphasor signals in industrial rotating equipment .

The PR6423 series features an 8 mm probe tip diameter and utilizes proven eddy current technology to provide wear-free, maintenance-free operation with exceptional long-term stability . These sensors are engineered to meet the stringent requirements of the API 670 standard for machinery protection systems, ensuring reliable performance in the most demanding environments .

Technical Specifications

The Emerson PR6423/014-110 delivers precision measurement capabilities essential for protecting critical assets:

Parameter Specification

Sensor Type Eddy Current Displacement Sensor

Probe Diameter 8 mm

Linear Measurement Range 2 mm (80 mils) 

Sensitivity 8 V/mm (203.2 mV/mil) ± 1% 

Initial Air Gap Approx. 1.5 mm (0.06") nominal 

Frequency Response DC to 10 kHz 

Resolution 0.1 µm (sub-micron level) 

Accuracy ±0.05% to ±1% of full scale (configuration dependent) 

Temperature Range -35°C to +180°C (standard); available up to +200°C 

Temperature Error <2%/100°K (API compliant) 

Pressure Resistance 10,000 hPa (145 psi) to sensor head 

Target Material Ferromagnetic steel (42 CrMo 4 standard) 

Minimum Shaft Diameter ≥ 25 mm 

Maximum Surface Speed 2500 m/s (98,425 ips) 

Shock/Vibration Resistance 5g @ 60 Hz @ 25°C 

Housing Material Stainless Steel sleeve, PTFE cable 

Weight ~100 grams (sensor with 1m cable, no armor)