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Product Introduction
The Epro PR6424/016-021 16 mm Eddy Current Sensor is a high-precision, non-contact displacement probe specifically engineered for continuous monitoring of shaft vibration and position in demanding industrial applications. Utilizing advanced eddy-current technology, it provides highly accurate measurements of both static and dynamic displacement without mechanical contact, ensuring long-term reliability. Its 16 mm stainless-steel sensor head and rugged IP67 housing make it suitable for extreme environments, including high-temperature, high-vibration, and chemically aggressive conditions.
Technical Specifications
| Parameter | Details |
|---|---|
| Model Number | PR6424/016-021 |
| Manufacturer | Epro (Brüel & Kjær Vibro) |
| Measurement Principle | Non-contact eddy current displacement |
| Sensor Head Diameter | 16 mm |
| Nominal Measuring Range | 0–4 mm (typical, adjustable via CON021 driver) |
| Linear Range | ±2 mm around calibrated mid-gap |
| Sensitivity | 8 mV/µm ±2 % |
| Frequency Response | DC to 10 kHz (−3 dB) |
| Power Supply | ±15 VDC via compatible Epro driver |
| Operating Temperature | −35 °C to +180 °C |
| Storage Temperature | −40 °C to +200 °C |
| Vibration Resistance | 20 g, 10–2 000 Hz |
| Protection Class | IP67 stainless-steel housing |
| Weight | 0.2 kg |
| Compliance | CE, RoHS, optional ATEX for hazardous areas |
Applications
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Turbomachinery Monitoring – Measures radial shaft displacement and vibration for turbines, compressors, and generators in real time.
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Bearing Gap Measurement – Detects rotor movement relative to bearings for early fault detection and predictive maintenance.
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Critical Pumps and Motors – Provides continuous monitoring to prevent imbalance, misalignment, and cavitation damage.
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Industrial Condition Monitoring – Integrates with Epro CON021 drivers for centralized vibration and displacement monitoring.
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Predictive Maintenance Programs – Supplies precise shaft displacement data for machine health diagnostics in power plants, refineries, and chemical processing facilities.
Advantages
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High Accuracy and Stability – Maintains 8 mV/µm sensitivity with minimal thermal drift.
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Rugged Construction – IP67 stainless-steel housing protects against dust, moisture, and chemical exposure.
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Wide Temperature Range – Reliable performance from −35 °C to +180 °C.
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Fast Dynamic Response – DC to 10 kHz bandwidth captures both slow and high-frequency vibration.
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Non-Contact Operation – Eliminates mechanical wear, reducing maintenance and extending sensor lifespan.
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Flexible Integration – Fully compatible with Epro CON021 driver modules and third-party monitoring systems.
FAQ
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Which driver module is recommended for the PR6424/016-021 sensor?
The Epro CON021 driver is preferred for accurate excitation, calibration, and temperature compensation. -
How does the sensor maintain measurement stability under extreme temperatures?
The sensor uses temperature-stable coil materials combined with the CON021 driver’s compensation circuits to maintain accurate readings from −35 °C to +180 °C. -
What is the linear range of the sensor?
It provides a linear range of ±2 mm around the calibrated mid-gap, suitable for most industrial shaft monitoring applications. -
Can the sensor operate under high-vibration conditions?
Yes, it withstands continuous vibration up to 20 g across the 10–2 000 Hz frequency range without loss of signal integrity. -
Is it compatible with third-party monitoring systems?
Yes, with correct impedance matching and calibration, it can integrate with most industrial vibration monitoring platforms. -
What frequency range does the sensor support?
The sensor provides a flat response from DC to 10 kHz (−3 dB), capturing both low-frequency displacement and high-frequency vibrations. -
Does the sensor require field calibration?
Field calibration is recommended to fine-tune the driver’s zero and gain settings using a precision micrometer gap reference. -
Can this sensor be used in hazardous locations?
An ATEX-certified version is available, permitting safe operation in Zone 1 and Zone 2 hazardous areas when used with approved barriers. -
What type of output signal is generated by the sensor?
The sensor produces a voltage proportional to shaft displacement at 8 mV/µm, compatible with industrial monitoring systems. -
How is mechanical wear avoided during operation?
Non-contact eddy-current technology ensures no physical contact with the shaft, eliminating wear and extending operational life.
Recommended Related Models (Same Series)
| Model Number | Description |
|---|---|
| PR6424/000-030 | Standard 8 mm eddy current probe for general machinery |
| PR6424/010-000 | 8 mm high-temperature variant |
| PR6424/015-000 | 11 mm extended-range probe |
| PR6424/016-100 | 16 mm high-precision displacement sensor |
| PR6424/017-100 | 16 mm high-accuracy sensor |
| PR6424/018-000 | 16 mm base configuration |
Popular Epro Models (Same Brand)
| Model Number | Description |
|---|---|
| MMS6210 | Advanced machine monitoring system for turbines and compressors |
| PR6423/005-010 | Compact eddy current probe for limited-space applications |
| PR6425/010-140 | High-temperature displacement sensor |
| MMS6312 | Multi-channel condition monitoring module |
| CON021 | Universal driver module for Epro eddy current sensors |
| MMS6110 | Vibration monitoring and diagnostics unit |
