EMERSON PR6423/011-110+C0N021

The EMERSON PR6423/011-110+C0N021 is a comprehensive vibration transducer system, part of the renowned Bently Nevada 3300 XL series for machinery condition monitoring. It integrates a sensitive eddy current proximity probe and a rugged extension cable to provide precise, real-time measurement of radial vibration and axial position in critical rotating equipment.

Product Description

The EMERSON PR6423/011-110+C0N021 kit is a pre-configured proximity measurement system. Its primary function is to non-invasively detect changes in the distance (gap) between the probe tip and a rotating shaft’s surface, converting this physical displacement into a standardized voltage signal for monitoring and protection systems. This particular model, the EMERSON PR6423/011-110+C0N021, is engineered for general-purpose industrial applications requiring high reliability. Installing the complete EMERSON PR6423/011-110+C0N021 kit ensures optimal signal integrity from the measurement point to the monitoring module, as the probe and cable are factory-matched and calibrated. For maintenance and reliability engineers, this system is a fundamental component for predictive maintenance strategies, helping to detect imbalances, misalignment, and other mechanical faults before they cause failure. The robust construction of the probe and the shielded extension cable within the EMERSON PR6423/011-110+C0N021 assembly is designed to withstand the high-temperature, high-vibration environments typical of turbomachinery.

Product Parameters

• Manufacturer: Emerson Automation Solutions (Bently Nevada product line).

• Product Series: 3300 XL NSv Proximity Transducer System.

• Model: PR6423/011-110 (Probe) + C0N021 (5-meter Extension Cable).

• Component 1: Probe (PR6423/011-110):

  • Type: Eddy Current Proximity Sensor.

  • Diameter: 8 mm (standard).

  • Sensitivity: -7.87 V/mm (-200 mV/mil), a standard industrial scale.

  • Linear Range: Typically 2 mm (80 mils).

  • Temperature Rating: Up to 120°C (248°F) with appropriate cable.

• Component 2: Cable (C0N021):

  • Type: Integral, PVC-jacketed, double-shielded coaxial cable.

  • Length: 5 meters.

  • Connectors: Standard Bently Nevada 3-pin MS-style connectors (male on probe end, female on monitor end).

• System Output: -2 to -18 V DC linear signal proportional to gap.

Advantages and Features

• Factory-Matched System: The probe and cable are supplied as a calibrated pair, ensuring specified system sensitivity and performance, eliminating mismatch errors.

• High Reliability & Stability: Offers excellent long-term signal stability and immunity to electrical noise, crucial for accurate trend analysis.

• Robust Mechanical Design: The stainless steel probe body and ruggedized cable are built for harsh industrial environments with oil, steam, and vibration.

• Standardized Output: Provides a common voltage range that is directly compatible with Bently Nevada 3300, 3500, and other industry-standard monitoring systems.

• Predictive Maintenance Enabler: The accurate data from the EMERSON PR6423/011-110+C0N021 is key for identifying developing machinery problems, allowing for planned interventions.

Application Cases in Industry

• Steam & Gas Turbines: Primary measurement for rotor vibration and eccentricity in power generation and mechanical drive applications.

• Centrifugal Compressors: Critical for monitoring shaft vibration on air, process gas, and refrigeration compressors in oil & gas and chemical plants.

• Large Pumps & Motors: Used on critical feedwater pumps, boiler circulation pumps, and high-power motor bearings to detect wear and imbalance.

• Generators & Gearboxes: Monitors shaft relative vibration on the non-drive end and other key locations.

Comparison with Competing Products

Competing proximity systems from manufacturers like SKF (CMSS series) or Rockwell/Entek use similar eddy current technology. The primary advantage of the EMERSON PR6423/011-110+C0N021 lies in its universal acceptance as the industry benchmark, its seamless compatibility with the vast installed base of Bently Nevada and compatible monitoring systems, and its unparalleled global service and support network. While generic probes and cables may be cheaper, they risk calibration drift, compatibility issues, and lack of certification for safety-critical applications. The Emerson system provides guaranteed performance and traceability.

Selection Suggestions and Precautions

1. Verify System Compatibility: Ensure the EMERSON PR6423/011-110+C0N021 sensitivity (-7.87 V/mm) and electrical characteristics match your existing monitoring system’s (e.g., 3300 XL monitor) input requirements.

2. Confirm Mechanical Fit: Check the probe diameter (8mm) and required mounting hardware (probe holder, nuts) are suitable for the installed thread in your machinery casing.

3. Observe Temperature Limits: Ensure the ambient and surface temperatures at the installation point are within the specified limits for the probe and cable. For higher temperatures, a different cable type (e.g., high-temp) may be required.

4. Installation is Critical: Proper installation following Bently Nevada guidelines—including gap setting, cable routing away from power lines, and secure connections—is essential for accurate readings. Never kink or damage the coaxial cable.

5. Source Authentic Kits: Always purchase the probe-and-cable kit from authorized Emerson/Bently Nevada channels. Mixing probes and cables from different sources or batches can degrade system accuracy and is not recommended for critical machinery.