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- Bently Nevada
- 21502-01
- 8mm Eddy Current Probe
- USA
- 8 mm
- 3 kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
- 1-3 Working Days
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Global Logistics
We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
The Bently Nevada 21502-01 is an 8 mm Eddy Current Probe designed for non-contact measurement of shaft vibration, displacement, and position in industrial rotating machinery.
This probe is part of Bently Nevada’s eddy-current sensing technology line, providing accurate, reliable, and continuous monitoring of critical rotating equipment. Its 8 mm diameter allows for slightly larger shaft measurement ranges while maintaining high precision and stability.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 21502-01 |
| Product Type | Eddy Current Probe |
| Probe Diameter | 8 mm |
| Measurement Principle | Eddy-current, non-contact sensing |
| Shipping Weight | 3 kg |
| Measurement Type | Shaft vibration, displacement, and position |
| Linear Measurement Range | 2–3 mm (varies with system configuration) |
| Sensitivity | 200 mV/mil (typical) |
| Frequency Response | Up to 10 kHz |
| Application | Machinery protection, condition monitoring, and diagnostic measurement |
Function and Working Principle
The 21502-01 operates using eddy-current sensing:
- The probe tip generates a high-frequency electromagnetic field.
- When placed near a conductive target such as a rotating shaft, eddy currents are induced in the target surface.
- Variations in the gap between the probe and the target alter the electromagnetic field.
- These variations are converted into electrical signals proportional to shaft vibration and displacement.
Being non-contact, the probe ensures minimal wear and long-term reliable operation.
Key Features
- 8 mm probe diameter for larger gap applications
- Non-contact eddy-current sensing
- Accurate displacement and vibration measurement
- Wide frequency response for dynamic machinery analysis
- Rugged industrial construction
- Stable performance over long-term operation
- Suitable for continuous online monitoring
- Compatible with Bently Nevada monitoring systems
Industrial Applications
- Steam turbine shaft monitoring
- Gas turbine protection
- Compressor vibration and displacement analysis
- Pump shaft monitoring
- Generator condition monitoring
- Electric motor vibration analysis
- Gearbox diagnostics
- Oil and gas processing plants
- Power generation facilities
Installation Overview
- Mounted using probe housings or threaded fittings
- Positioned close to the shaft without contact
- Connected to extension cable and Proximitor signal conditioner
- Requires precise probe-to-shaft gap adjustment
- Suitable for radial and axial position measurements
Compatible Components
| Component | Description |
|---|---|
| Bently Nevada Extension Cable | Connects probe to signal conditioner |
| Proximitor Sensor | Converts probe signals to electrical outputs |
| Machinery Protection System | Provides alarm and shutdown functionality |
| Probe Housing Assembly | Mechanical protection and mounting |
| Diagnostic Software | Condition monitoring and analysis |
Alternative Models
| Model | Description |
|---|---|
| 21500-00-08-10-02 | 5 mm Eddy Current Probe |
| 21500-00-12-05-02 | 5 mm Eddy Current Probe |
| 21502-02 | 8 mm Eddy Current Probe (variant) |
| 21502-03 | 8 mm Eddy Current Probe (variant with extended range) |
Key Advantages
- Accurate non-contact shaft measurement
- Reliable operation in critical machinery
- Larger 8 mm diameter for wider measurement gap
- Rugged and durable construction
- Supports predictive maintenance programs
- Long operational life
- Reduces unplanned downtime in machinery
Conclusion
The Bently Nevada 21502-01 8 mm Eddy Current Probe is a high-precision, durable, and compact device for continuous monitoring of shaft vibration, displacement, and position. Its eddy-current technology and rugged design make it ideal for industrial machinery protection and condition monitoring across turbines, compressors, pumps, and other rotating equipment.