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- Bently Nevada
- 21502-04
- 7200 5mm Probe
- USA
- 5 mm
- 3 kg
- Xiamen, China
- New & In Stock
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- 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 21502-04 is a 7200 Series 5 mm Proximity Probe designed for non-contact measurement of shaft vibration, displacement, and position in industrial rotating machinery.
Part of the 7200 Proximity Transducer System, this probe employs eddy-current sensing technology, ensuring highly accurate and reliable monitoring of critical machine components. Its compact 5 mm probe diameter is ideal for installations with limited space while providing excellent measurement performance.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 21502-04 |
| Product Type | 7200 Series Proximity Probe |
| Series | 7200 |
| Probe Diameter | 5 mm |
| Measurement Principle | Eddy-current, non-contact sensing |
| Shipping Weight | 3 kg |
| Measurement Type | Shaft vibration, displacement, and position |
| Linear Measurement Range | 2 mm (80 mils) |
| Sensitivity | 200 mV/mil (7.87 V/mm) |
| Frequency Response | Up to 10 kHz |
| Application | Machinery protection and condition monitoring |
Function and Working Principle
The 21502-04 operates using eddy-current technology:
- The probe tip generates a high-frequency electromagnetic field.
- When positioned near a conductive target, eddy currents are induced in the target surface.
- Changes in the gap between the probe and target alter the electromagnetic field.
- These variations are converted into electrical signals proportional to shaft vibration and displacement.
This non-contact measurement ensures minimal wear and long-term reliable operation.
Key Features
- Compact 5 mm probe diameter
- Non-contact eddy-current sensing technology
- High-accuracy shaft vibration and displacement measurement
- Wide frequency response for dynamic machinery analysis
- Rugged and industrial-grade construction
- Long-term operational stability
- Compatible with 7200 Series monitoring systems
- Supports continuous online monitoring
- Ideal for predictive maintenance programs
Industrial Applications
- Steam turbine shaft monitoring
- Gas turbine protection systems
- Compressor vibration and displacement analysis
- Pump shaft condition monitoring
- Generator vibration and position measurement
- Electric motor diagnostics
- Gearbox condition monitoring
- Oil and gas processing facilities
- Power generation plants
Installation Overview
- Mounted using probe housings or threaded fittings
- Positioned close to the shaft without physical contact
- Connected to extension cable and signal conditioner
- Requires proper probe-to-shaft gap adjustment
- Suitable for radial vibration and axial position measurements
Compatible Components
| Component | Description |
|---|---|
| 7200 Series Extension Cable | Connects probe to Proximitor or signal conditioner |
| Proximitor Sensor | Converts probe signals into electrical outputs |
| Machinery Protection System | Provides alarm and shutdown functionality |
| Probe Housing Assembly | Mechanical mounting and environmental protection |
| Diagnostic Software | Machinery condition monitoring and analysis |
Alternative Models
| Model | Description |
|---|---|
| 21500-00-08-10-02 | 7200 Series 5 mm Probe |
| 21500-00-12-05-02 | 7200 Series 5 mm Probe |
| 21500-00-12-10-02 | 7200 Series 5 mm Probe |
| 21500-04-02-10-02 | 7200 Series 5 mm Probe |
| 21500-04-32-05-02 | 7200 Series 5 mm Probe |
Key Advantages
- Accurate non-contact shaft measurement
- Reliable for critical rotating machinery
- Compact design suitable for tight installations
- Rugged and durable industrial construction
- Supports predictive maintenance and condition monitoring
- Long operational service life
- Reduces unexpected equipment downtime
Conclusion
The Bently Nevada 21502-04 7200 5 mm Probe is a high-performance, compact, and reliable proximity sensing device for continuous monitoring of shaft vibration, displacement, and position. Its eddy-current technology and industrial-grade construction make it ideal for machinery protection and condition monitoring in demanding industrial applications.