Emerson PR6423/000-121 + CON041 | Eddy Current Sensor for Turbines

Product Description

Overview

The EPRO PR6423/000-121 is part of Emerson’s AMS / EPRO PR6423 series of eddy current displacement sensors, providing non-contact measurement of shaft vibration, position, and eccentricity in turbomachinery such as turbines, compressors, pumps, and gearboxes.

This model features an 8 mm probe tip with a 21 m integrated cable, suitable for installations where the monitoring system is located at a considerable distance from the measurement point. Moreover, it operates on eddy current technology, ensuring wear-free operation, high precision, and long-term stability in demanding environments.

The PR6423 series is widely used in condition monitoring and machinery protection systems, fully compliant with API 670 standards, and integrates seamlessly with Emerson monitoring platforms such as AMS 6500 and VM600.

The CON041 signal converter complements this sensor, converting weak analog signals into standard 0–10 V or 4–20 mA output, providing compatibility with industrial control systems for real-time vibration and displacement monitoring.

Technical Specifications – PR6423/000-121

• Product Type: Eddy Current Displacement Sensor

• Model Number: PR6423/000-121

• Manufacturer: Emerson / EPRO

• Probe Tip Diameter: 8 mm

• Cable Length: 21 m (integrated, “121” variant)

• Linear Measurement Range: 2 mm (80 mils)

• Initial Air Gap: 0.5 mm (20 mils)

• Incremental Scale Factor (ISF): 8 V/mm ±5% @ 0–45 °C

• Deviation from Best Fit Line (DSL): ±0.025 mm

• Minimum Shaft Diameter: 25 mm (0.79 in)

• Target Material: Ferromagnetic steel (42CrMo4 / AISI 4140)

• Frequency Response: Up to 10 kHz

• Output Signal: Analog voltage (compatible with monitoring systems)

• Operating Temperature Range: –40 °C to +125 °C (up to +160 °C T3 version)

• Protection Class: IP66 (IEC 60529)

• Housing Material: Stainless steel

• Weight: 0.3–0.4 kg depending on cable length

• Compliance: API 670

FAQ

Q1: What is the difference between PR6423/000-121 and other PR6423 models?
A1: The 121 variant features a 21 m cable, designed for installations with distant monitoring points.

Q2: Is the sensor API 670 compliant?
A2: Yes, PR6423/000-121 is fully API 670 compliant for critical machinery.

Q3: What signals does the CON041 output provide?
A3: It converts weak sensor signals to standard voltage (0–10 V) or current (4–20 mA).

Q4: Can this sensor be used in harsh industrial environments?
A4: Yes, it has a stainless steel housing and IP66 protection, suitable for challenging conditions.

Q5: Which monitoring platforms are compatible?
A5: The sensor works seamlessly with Emerson AMS 6500 and VM600 systems, as well as standard industrial PLCs.