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- Bently Nevada
- 21504-12-32-10-02
- 7200 Series 8 mm Probe
- USA
- 1 meter
- 0.22 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Bently Nevada 21504-12-32-10-02 7200 Series 8 mm Probe is a non-contact displacement probe designed for rotating machinery monitoring. It is part of the 7200 Series and is used to detect changes in the position of a conductive target, typically a rotating shaft.
In machinery condition-monitoring systems, shaft displacement and vibration information can provide valuable indications of mechanical operating conditions. The probe works with compatible proximity electronics to convert changes in the probe-to-target relationship into an electrical measurement signal.
This type of probe is commonly used around rotating equipment such as turbines, compressors, pumps, motors, generators, and other machinery where continuous shaft monitoring is required.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 21504-12-32-10-02 |
| Product Type | 7200 Series 8 mm Probe |
| Series | 7200 Series |
| Probe Type | Non-Contact Displacement Probe |
| Probe Diameter | 8 mm |
| Main Function | Shaft Displacement and Vibration Measurement |
| Measurement Principle | Eddy Current / Proximity Sensing |
| Application | Rotating Machinery Monitoring |
| Total Length | 1 meter |
| Weight | 0.22 kg |
| Typical Application | Turbines, Compressors, Pumps, Motors and Generators |
Product Features
The 21504-12-32-10-02 is designed for applications where continuous monitoring of shaft movement is required.
Key characteristics include:
- Bently Nevada 7200 Series probe design
- 8 mm probe configuration
- Non-contact sensing
- Designed for shaft displacement measurement
- Suitable for vibration monitoring systems
- Works with compatible proximity electronics
- Provides measurement information without physical contact with the rotating shaft
- Total length of 1 meter
- Stated weight of 0.22 kg
- Suitable for industrial rotating equipment
The non-contact construction allows the probe to monitor a moving shaft without introducing mechanical contact or wear at the sensing point.
Working Principle
The probe operates using a proximity sensing principle based on the interaction between the probe and a conductive target.
A simplified monitoring path is:
Probe → Proximity Electronics → Monitoring System → Alarm / Protection System
The probe is installed close to the monitored shaft. When the shaft moves relative to the probe tip, the electrical characteristics of the sensing field change.
The associated proximity electronics process this change and provide a corresponding electrical signal to the monitoring system. The resulting information can be used to evaluate shaft displacement, vibration, and changes in machine operating condition.
Because the measurement is non-contact, the probe can monitor rotating machinery continuously while the shaft remains in operation.
Role in Machinery Condition Monitoring
The 21504-12-32-10-02 serves as the sensing element within a larger machinery monitoring system.
| Function | Description |
|---|---|
| Shaft Displacement Monitoring | Detects changes in shaft position |
| Vibration Measurement | Provides displacement information for vibration analysis |
| Non-Contact Measurement | Monitors the target without physical contact |
| Continuous Monitoring | Supports ongoing machinery observation |
| Condition Assessment | Provides information about shaft movement |
| Machinery Protection | Supplies measurement data to monitoring equipment |
The probe itself is responsible for sensing. Signal conditioning, monitoring, alarm processing, and protective actions are handled by the associated electronics and monitoring system.
Industrial Applications
The 7200 Series 8 mm probe can be used in various rotating machinery applications.
| Application | Typical Use |
|---|---|
| Steam Turbines | Shaft vibration and displacement monitoring |
| Gas Turbines | Rotor condition monitoring |
| Compressors | Shaft movement measurement |
| Pumps | Rotating equipment monitoring |
| Motors | Shaft vibration detection |
| Generators | Rotor monitoring |
| Industrial Machinery | Continuous condition monitoring |
| Rotating Equipment | Predictive maintenance applications |
The installation method and measurement arrangement depend on the specific machine, shaft configuration, mounting location, and monitoring equipment.
Installation and Maintenance
Correct probe installation is important because the distance between the probe tip and the monitored target directly influences the measurement.
Before installation, verify the complete probe model and compatibility with the associated proximity electronics.
Recommended practices include:
- Confirm the complete 21504-12-32-10-02 part number.
- Verify compatibility with the monitoring system.
- Inspect the probe tip for mechanical damage.
- Check the cable and connector condition.
- Install the probe securely.
- Maintain the required probe-to-target clearance.
- Ensure proper alignment with the monitored shaft.
- Avoid excessive cable tension.
- Protect the cable from mechanical damage and excessive heat.
- Check the output signal after installation.
- Compare the measured signal with expected machine conditions.
If an abnormal reading occurs, both the probe and the installation environment should be checked. Incorrect probe clearance, shaft movement, cable problems, or proximity-electronics issues can all affect the measurement.
Related Components
The probe is normally used as part of a complete machinery monitoring chain.
| Component | Function |
|---|---|
| 7200 Series Probe | Detects shaft displacement |
| Proximity Electronics | Conditions the probe signal |
| Monitoring Module | Processes sensor information |
| Vibration Monitor | Evaluates vibration characteristics |
| Machine Protection System | Provides alarms and protective actions |
| Shaft Target | Conductive surface being monitored |
| Extension Cable | Connects the probe with associated electronics |
The probe, proximity electronics, and monitoring system should be treated as a complete measurement chain when selecting replacement components.
Recommended Related Models
| Model / Component | Type | Primary Function | Application |
|---|---|---|---|
| Bently Nevada 21504-12-32-10-02 | 7200 Series 8 mm Probe | Shaft displacement measurement | Rotating machinery |
| Bently Nevada 21504-12-28-10-02 | 7200 Series 8 mm Probe | Non-contact displacement sensing | Machinery monitoring |
| Bently Nevada 21504-00-48-10-00 | 7200 Series 8 mm Probe | Shaft displacement monitoring | Rotating equipment |
| Bently Nevada 21504-00-52-10-02 | 7200 Series 8 mm Probe | Shaft vibration and displacement measurement | Industrial machinery |
| Bently Nevada 7200 Series | Probe Family | Non-contact machinery monitoring | Rotating equipment |
When replacing a 7200 Series probe, the complete part number should be matched rather than relying only on the probe diameter. Cable length, connector configuration, mounting arrangement, electrical characteristics, and compatibility with the proximity electronics should also be considered.
Key Advantages
- 7200 Series 8 mm probe design
- Non-contact shaft displacement measurement
- Suitable for rotating machinery monitoring
- Supports vibration measurement
- Designed for continuous condition monitoring
- Works with compatible proximity electronics
- Suitable for turbines, compressors, pumps, motors, and generators
- Total length of 1 meter
- Stated weight of 0.22 kg
Technical FAQs
What type of machinery can the 21504-12-32-10-02 monitor?
The probe can be used in rotating machinery applications where shaft displacement or vibration needs to be monitored, including turbines, compressors, pumps, motors, generators, and similar equipment.
Why is an 8 mm proximity probe suitable for shaft monitoring?
An 8 mm probe provides a compact sensing arrangement that can be installed near a rotating shaft. Its non-contact operating principle allows the shaft to rotate continuously while the probe measures changes in relative position.
What is the function of the proximity electronics connected to the probe?
The proximity electronics provide the electrical interface and signal conditioning required to convert the probe’s sensing response into a usable measurement signal for the monitoring system.
What can cause an abnormal probe reading?
Incorrect probe clearance, poor alignment, damaged cables, connector problems, shaft movement, target-surface conditions, or faults in the associated proximity electronics can affect the measurement.