PR6423/000-021 Eddy Current Sensor | Emerson EPRO Series

Product Description

Product Overview

The EPRO PR6423/000-021 is a high-precision eddy current displacement sensor engineered for non-contact measurement of shaft vibration, position, and eccentricity in turbomachinery.
It belongs to Emerson’s PR6423 series, widely used in condition monitoring and machinery protection systems across industrial environments.

Moreover, it operates using eddy current technology, ensuring wear-free operation, exceptional accuracy, and long-term measurement stability.
With an 8 mm probe tip and an integrated 21-meter cable, this model is ideal for installations where the monitoring system is located far from the measurement point.

The PR6423/000-021 integrates seamlessly with Emerson monitoring platforms, including AMS 6500 and VM600, and is compliant with API 670 standards, ensuring reliable operation in critical machinery applications.

Technical Specifications

Product Type: Eddy Current Displacement Sensor
Model Number: PR6423/000-021
Manufacturer: Emerson / EPRO

Probe Tip Diameter: 8 mm
Integrated Cable Length: 21 m

Linear Measurement Range: 2 mm (80 mils)
Initial Air Gap: 0.5 mm (20 mils)

Incremental Scale Factor (ISF):

• 8 V/mm (203.2 mV/mil) ±5% at 0–45 °C

Deviation from Best Fit Line (DSL):

• ±0.025 mm (±1 mil)

Minimum Shaft Diameter: 25 mm (0.79 in)
Target Material: Ferromagnetic steel (42CrMo4 / AISI 4140 standard)

Frequency Response: Up to 10 kHz
Output Signal: Analog voltage compatible with Emerson monitoring systems

Operating Temperature Range:

• –40 °C to +125 °C standard

• Up to +160 °C in T3 variants

Protection Class: IP66 (IEC 60529)
Housing Material: Stainless steel
Weight: 0.2–0.3 kg depending on cable configuration

Compliance: API 670

Frequently Asked Questions (FAQ)

Q1: What does the PR6423/000-021 measure?
A1: It measures shaft vibration, radial and axial displacement, and eccentricity using eddy current technology.

Q2: How long is the integrated cable for this sensor?
A2: This model features a 21-meter integrated cable for flexible installation in large machines.

Q3: Can it operate in high-temperature environments?
A3: Yes, standard operation is –40 °C to +125 °C, with T3 variants up to +160 °C.

Q4: Is it compatible with Emerson monitoring systems?
A4: Yes, it works seamlessly with AMS 6500, VM600, and other Emerson monitoring platforms.

Q5: Does it require physical contact with the shaft?
A5: No, it uses non-contact eddy current measurement, eliminating mechanical wear and maintenance issues.