Description

Product Description

Overview
The Emerson PR6426/000-130 paired with the CON021/916-200 signal converter forms a robust displacement measurement system for large-scale rotating machinery. This combination provides precise monitoring of shaft displacement, vibration, and position, optimized for applications that demand a larger measuring range or interaction with larger target surfaces.

System Components

PR6426/000-130 (Eddy Current Sensor)

• High-performance inductive displacement probe with an 18 mm tip diameter.

• Designed for extended measurement ranges up to 8.0 mm, suitable for axial or radial shaft displacement.

• Generates a high-frequency electromagnetic field to detect distances to conductive targets.

• Available with configurable cable lengths to meet installation requirements.

CON021/916-200 (Signal Converter)

• Dedicated transmitter providing power and signal linearization for the PR6426 probe.

• Calibrated to handle the extended range and electrical characteristics of the PR6426 series.

• Converts raw displacement data into a highly linear voltage output for integration into monitoring or machine protection systems.

Performance Features

Extended Measurement Capability

• Supports wider measuring spans than standard eddy current probes, ideal for large machinery gaps.

High Sensitivity & Stability

• Maintains a strong signal-to-noise ratio even with large target surfaces, ensuring reliable displacement and vibration readings.

Thermal and Mechanical Robustness

• Hermetically sealed probe tip for high-pressure environments.

• Temperature-compensated converter ensures consistent output despite thermal fluctuations.

Non-Contact Measurement

• Eddy current principle allows maintenance-free operation without mechanical wear.

Machine Protection Ready

• Linear output and fast response support real-time safety systems, including automatic trips in case of excessive shaft movement.

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Technical Specifications

Feature	Specification
Probe Tip Diameter	18 mm
Measurement Range	Up to 8.0 mm
Sensitivity	Typically 2.0 V/mm or 4.0 V/mm (calibration-dependent)
Frequency Range	0 Hz (Static) to several kHz (Dynamic)
Output Type	Negative voltage proportional to displacement
Target Material	Calibrated for ferromagnetic metals (e.g., VCL 140 / 42CrMo4)
Operating Temperature	-30°C to 100°C (-22°F to 212°F)
Shock & Vibration	5g @ 60 Hz, 25°C (77°F)
Protection Class	IP20
Mounting	4 × M5x20 screws (included)
Housing Material	LMgSi 0.5 F22
Weight	~120 g (4.24 oz)
Electrical Connections	Transducer: Self-locking Lemo plug; Supply/Output: Screw terminal (max. 1.5 mm² wire)

Applications

• Large steam turbines for axial thrust and expansion monitoring

• Hydroelectric generators to track shaft vibration and air gap

• Heavy-duty compressors for radial displacement and eccentricity detection

• Industrial pumps and rotating equipment requiring extended-range displacement sensing

FAQ

Q: Can the PR6426 operate with standard converters?
A: No, the PR6426/000-130 requires the CON021/916-200 for proper linearization and extended range operation.

Q: What environments can this system handle?
A: It is suitable for high-temperature (-30°C to 100°C), high-pressure, and moderate vibration environments (5g at 60 Hz).

Q: How does it differ from PR6423 probes?
A: PR6426 has a larger tip and extended measuring range (up to 8.0 mm) for bigger shafts or target surfaces, whereas PR6423 is optimized for smaller gaps and standard industrial machinery.

Specifications

• Brand: EMERSON

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems