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Product Introduction
The Epro PR6424/103-121 16 mm Eddy Current Sensor is a high-precision, non-contact displacement probe engineered for continuous monitoring of shaft vibration, radial displacement, and rotor position in critical rotating equipment. Using advanced eddy-current technology, it provides micron-level accuracy, rapid dynamic response, and exceptional linearity across its full measuring range.
This sensor belongs to Epro’s established PR6424 series, which is designed for heavy-duty applications in power generation, petrochemical, and industrial machinery. Its rugged stainless-steel construction, wide operating temperature range, and strong immunity to electromagnetic interference make it a dependable choice for predictive maintenance and machine protection systems operating in harsh industrial environments.
Product Specifications
| Parameter | Specification |
|---|---|
| Model | PR6424/103-121 |
| Sensing Principle | Eddy current, non-contact |
| Sensor Head Diameter | 16 mm |
| Measurement Range | 0 – 4 mm (typical), linearity ±0.5 % |
| Sensitivity | 8 mV/µm nominal (factory calibrated) |
| Frequency Response | DC – 10 kHz (–3 dB) |
| Recommended Gap | 1.0 – 2.0 mm |
| Output Signal | 0 – 24 V DC proportional to displacement |
| Temperature Range (Probe) | –35 °C to +180 °C |
| Temperature Coefficient | ≤0.03 %/°C |
| Insulation Resistance | >100 MΩ @ 500 V DC |
| Power Supply (via driver) | –24 V DC |
| Cable Type/Length | Mineral-insulated cable, standard 5 m (custom options available) |
| Housing Material | Stainless steel |
| Mounting Thread | M16 × 1.5 or compatible sleeve |
| Weight | 0.2 kg |
| Certifications | CE, ATEX Zone 1/2, IECEx |
Applications
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Turbomachinery Monitoring: Gas and steam turbines in power plants.
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Compressors and Pumps: Detects early signs of imbalance or bearing wear.
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Large Motors & Generators: Tracks rotor position and radial displacement.
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Gearboxes: Measures dynamic shaft motion to prevent catastrophic failures.
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Predictive Maintenance Systems: Integrates with condition-monitoring platforms such as Epro MMS or Bently Nevada.
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Industrial Fans and Blowers: Continuous vibration tracking for safety and efficiency.
Advantages
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High Precision: Micron-level measurement with excellent linearity.
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Wide Temperature Capability: Reliable operation from –35 °C to +180 °C.
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Rugged Construction: Stainless-steel housing and mineral-insulated cable for harsh environments.
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Strong EMI Immunity: Stable performance in electrically noisy facilities.
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Flexible Integration: Fully compatible with Epro CON021 and other standard proximity drivers.
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Fast Dynamic Response: Up to 10 kHz frequency response captures rapid vibration changes.
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Low Maintenance: Factory calibration reduces on-site adjustments.
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Hazardous Area Certifications: ATEX and IECEx approved for explosive atmospheres.
FAQ
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What is the nominal sensitivity of the PR6424/103-121?
8 mV/µm under standard calibration conditions. -
Which driver module is recommended for signal conditioning?
The Epro CON021 driver is the standard interface. -
Can the sensor operate in high electromagnetic interference areas?
Yes, its eddy-current design provides strong EMI immunity. -
What is the recommended operating gap between the probe and the shaft?
Typically 1.0 – 2.0 mm for optimal accuracy and linearity. -
Does the probe require a direct power supply?
Power is supplied through the driver module at –24 V DC. -
What is the frequency response capability?
DC to 10 kHz (–3 dB), enabling detection of rapid vibration events. -
Is the probe tip field-replaceable?
No, it is factory-sealed to maintain calibration integrity. -
Can the sensor cable length be customized?
Yes, mineral-insulated cables can be ordered in custom lengths. -
Which target materials provide the best measurement accuracy?
Ferromagnetic metals such as steel or iron are recommended. -
Is the PR6424/103-121 compatible with third-party monitoring systems?
Yes, as long as the system supports standard eddy-current probe signals.
Related Models
| Model | Description | Key Feature |
|---|---|---|
| PR6424/101-000 | 8 mm eddy current sensor | Compact probe for confined spaces |
| PR6424/102-120 | 11 mm eddy current sensor | Extended measurement range |
| PR6424/103-000 | 16 mm eddy current sensor | Standard 16 mm with alternative calibration |
| PR6424/104-121 | 25 mm eddy current sensor | Large gap measurement |
| PR6423/005-010 | 5 mm eddy current sensor | Ultra-small high-resolution monitoring |
| PR6424/014-040 | 16 mm high-temperature version | Operation up to 200 °C |
Popular Models
| Model | Description | Key Application |
|---|---|---|
| MMS3120/022-100 | Machine-monitoring module | Multi-channel vibration monitoring |
| MMS3125/022-020 | Condition-monitoring module | Advanced diagnostics |
| PR6423/010-040 | 8 mm eddy current proximity probe | Precision shaft-vibration measurement |
| CON021 | Proximity-probe driver and signal conditioner | Interface for PR642x series sensors |
| PR6424/01CS | 16 mm corrosion-resistant sensor | Chemical and corrosive environments |
| MMS6110 | Monitoring system controller | Centralized condition-monitoring platform |
