EPRO PR6424-013-120+CON021 Eddy Current Sensor

Overview

The EPRO PR6424-013-120+CON021 is a non-contact 16mm eddy current sensor designed specifically for high-precision measurements in critical turbomachinery applications. It efficiently monitors radial and axial shaft displacement, position, eccentricity, and speed in steam turbines, gas turbines, compressors, pumps, and fans. This sensor ensures reliable operation even in harsh industrial environments.

Key Features

Non-Contact Measurement: The sensor uses eddy current technology to measure shaft displacement without physical contact, ensuring minimal wear and long-term durability.
High Sensitivity and Linearity: Provides accurate readings with a sensitivity of 4 V/mm (101.6 mV/mil), maintaining a linearity of ±1.5%.
Wide Operating Temperature Range: The sensor operates effectively in temperatures ranging from -31°F to 302°F (-35°C to 150°C).
Durable Design: Built with stainless steel for the sleeve and PTFE for the cable, the sensor withstands harsh conditions including shock and vibration.
API 670 Compliant: The sensor meets the stringent standards of API 670 for industrial equipment monitoring.

Technical Specifications

Specification	Details
Model	EPRO PR6424-013-120+CON021
Sensor Type	Eddy Current Sensor
Measurement Range	Static: ±2.0 mm (0.079”); Dynamic: 0 to 1,000μm (0 to 0.039”)
Sensitivity/Linearity	4 V/mm (101.6 mV/mil), ±1.5%
Air Gap (Center)	Approx. 2.7 mm (0.11”) nominal
Long Term Drift	< 0.3%
Target Material	Ferromagnetic Steel (42 Cr Mo4 Standard)
Maximum Surface Speed	2,500 m/s (98,425 ips)
Shaft Diameter	≥80 mm
Operating Temperature Range	-35°C to 150°C (-31°F to 302°F)
Temperature Error	<4%/100°K (API 670 Compliant)
Pressure Resistance to Sensor Head	10,000 hPa (145 psi)
Shock and Vibration	5g @ 60Hz @ 25°C (77°F)
Material	Sleeve: Stainless Steel, Cable: PTFE
Weight (Sensor & 1M Cable)	~200 grams (7.05 oz)

Detailed Description

The EPRO PR6424-013-120+CON021 sensor measures shaft displacement with high precision and reliability. It employs eddy current technology to detect radial and axial displacement in turbomachinery applications. This non-contact method eliminates mechanical wear and ensures consistent performance over time.

With a sensitivity of 4 V/mm (101.6 mV/mil), the sensor delivers accurate measurements with minimal long-term drift. It also provides linear readings, maintaining an accuracy of ±1.5%. This makes it ideal for monitoring dynamic and static displacements in demanding industrial environments.

The sensor’s wide operating temperature range of -35°C to 150°C (-31°F to 302°F) ensures it functions reliably in extreme conditions, making it suitable for a variety of applications in the oil & gas, power generation, and manufacturing sectors.

The sensor’s ferromagnetic steel target (42 Cr Mo4 Standard) ensures accurate readings, while its stainless steel sleeve and PTFE cable make it resistant to environmental factors such as moisture, dust, and vibration. With a shock resistance of 5g at 60Hz, the sensor can endure mechanical stress without compromising performance.

Applications

Turbomachinery Monitoring: Ideal for monitoring displacement and eccentricity in steam turbines, gas turbines, compressors, and pumps.
Industrial Automation: Used for high-precision measurement in automation systems.
Vibration Monitoring: Measures dynamic displacement and vibration in rotating machinery.
Oil & Gas: Suitable for applications requiring resistance to high-pressure environments.