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Product Introduction
The Epro PR6424/017-121 16 mm Eddy Current Sensor is a high-accuracy, non-contact displacement probe engineered for continuous vibration and shaft-position monitoring in heavy-duty industrial environments. Built on Epro’s proven PR6424 platform, it uses advanced eddy-current technology to provide precise, drift-free measurement of dynamic and static shaft movements. Its 16 mm stainless-steel sensing head ensures superior stability, while its rugged design allows consistent operation under high temperatures, high vibration, and harsh process conditions.
Technical Specifications
| Parameter | Details |
|---|---|
| Model Number | PR6424/017-121 |
| 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 with 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 sealed housing |
| Weight | 0.2 kg |
| Compliance | CE, RoHS, optional ATEX for hazardous zones |
Applications
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Turbomachinery Monitoring – Measures radial shaft displacement and vibration in turbines, compressors, and generators.
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Bearing Gap and Rotor Position – Provides real-time detection of rotor-to-bearing movement for predictive maintenance.
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Critical Pumps & Motors – Enables early warning of imbalance, misalignment, and cavitation.
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Industrial Condition Monitoring – Seamlessly integrates with Epro CON021 drivers and plant-wide vibration monitoring systems.
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Predictive Maintenance Programs – Supplies accurate displacement data for data historians and diagnostic software in refineries, power plants, and chemical facilities.
Advantages
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High Accuracy & Stability – Maintains 8 mV/µm sensitivity with minimal thermal drift for reliable long-term monitoring.
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Robust Construction – Stainless-steel IP67 housing offers exceptional resistance to dust, moisture, and process chemicals.
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Wide Temperature Capability – Performs consistently from −35 °C to +180 °C for extreme process environments.
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Fast Dynamic Response – DC to 10 kHz bandwidth captures rapid transient vibration and shaft movement.
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Low Maintenance – Non-contact operation eliminates mechanical wear, extending service life and reducing downtime.
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Flexible Integration – Fully compatible with Epro CON021 driver modules and most industrial monitoring systems.
FAQ
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What is the recommended driver module for the PR6424/017-121?
The Epro CON021 driver is the preferred companion, ensuring accurate excitation, calibration, and temperature compensation for this sensor. -
How does the sensor maintain accuracy across large temperature changes?
Temperature-stable coil materials and the CON021’s internal compensation circuits preserve measurement accuracy from −35 °C to +180 °C. -
What frequency range can the sensor reliably capture?
It provides a flat frequency response from DC to 10 kHz (−3 dB), enabling detection of both slow displacement and high-speed vibration events. -
Can this sensor operate in areas with strong electromagnetic interference?
Yes, its coaxial cable shielding and driver filtering deliver excellent immunity to electrical noise and EMI. -
Is the sensor suitable for high-vibration installations?
Absolutely. It withstands continuous vibration up to 20 g across the 10–2 000 Hz range without affecting signal integrity. -
Does the PR6424/017-121 require field calibration after installation?
Field calibration is recommended to fine-tune the driver gain and zero settings using a precision micrometer gap reference. -
Can it be used in hazardous or explosive environments?
An ATEX-certified variant is available, permitting safe deployment in Zone 1 and Zone 2 hazardous areas when paired with approved safety barriers. -
What type of electrical output does the sensor provide?
It outputs a voltage signal proportional to shaft displacement at 8 mV/µm, compatible with industrial vibration and monitoring equipment. -
Is it possible to integrate this sensor into non-Epro monitoring systems?
Yes. With correct impedance matching and calibration, the PR6424/017-121 integrates seamlessly with third-party vibration monitoring platforms. -
How is mechanical wear avoided in continuous operation?
The non-contact eddy-current principle means no physical friction with the shaft, eliminating mechanical 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 |
| PR6424/018-000 | 16 mm base configuration |
| PR6424/020-000 | 25 mm large-gap sensor for heavy-duty shafts |
| PR6424/022-100 | High-frequency response model |
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 |
