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- 8 mm × 85 mm× 2000 mm
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Bently Nevada 84933-02 Proximity Sensor Product Detailed Introduction and Technical Specification
1. Product Introduction
The 84933-02 is an industrial proximity sensor designed for accurate measurement of shaft displacement, vibration movement, and mechanical position changes in rotating machinery.
The product is based on eddy current sensing technology, which enables non-contact measurement between the probe tip and the rotating shaft surface. This measurement principle allows the sensor to provide stable and precise feedback without direct mechanical contact.
The 84933-02 is mainly used in machinery condition monitoring systems and protection applications where continuous monitoring of rotating equipment is required.
It is suitable for critical industrial machines such as turbines, compressors, generators, motors, pumps, and other high-speed rotating equipment.
During operation, the sensor continuously detects the distance variation between the probe and the target shaft. The measurement signal can be used to evaluate vibration conditions, shaft movement, rotor stability, and mechanical performance.
The product is designed for industrial environments where high reliability, accurate measurement, and long service life are important requirements.
The 84933-02 provides an effective solution for predictive maintenance applications by helping operators identify abnormal equipment conditions before serious failures occur.
2. Brand Information
| Parameter | Description |
|---|---|
| Brand | Bently Nevada |
| Product Category | Industrial Proximity Sensor |
| Product Type | Eddy Current Displacement Probe |
| Main Function | Shaft vibration and displacement measurement |
| Measurement Principle | Non-contact electromagnetic sensing |
| Application Field | Rotating machinery condition monitoring |
| Typical Equipment | Turbines, compressors, generators, pumps, motors |
| Product Position | High reliability machinery monitoring component |
3. Product Series Information
The 84933-02 belongs to the 84933 Series Proximity Sensor Family.
The 84933 series is designed for industrial machinery monitoring applications requiring accurate shaft position detection and reliable vibration measurement.
Compared with traditional contact measurement methods, the series uses a non-contact sensing structure, which improves durability and reduces maintenance requirements.
The main characteristics of the 84933 series include:
- Eddy current displacement measurement technology
- Non-contact shaft monitoring
- High sensitivity signal detection
- Stable measurement output
- Excellent resistance to vibration
- Reliable operation under industrial conditions
- Long service life
- Suitable for continuous machinery monitoring
The series is commonly applied in rotating equipment protection systems, predictive maintenance programs, and industrial equipment diagnostic applications.
4. Product Technical Parameters
| Parameter | Specification |
|---|---|
| Model | 84933-02 |
| Product Type | Proximity Sensor / Eddy Current Displacement Probe |
| Measurement Principle | Eddy current non-contact displacement measurement |
| Measuring Object | Conductive rotating shaft surface |
| Main Function | Shaft displacement, vibration monitoring, position detection |
| Probe Diameter | Approx. 8 mm |
| Probe Structure | Industrial threaded probe design |
| Cable Length | Approx. 2 meters |
| Operating Temperature Range | Approx. -35°C to +180°C |
| Output Signal | Analog displacement voltage signal |
| Measurement Accuracy | High precision shaft movement detection |
| Installation Method | Threaded mounting installation |
| Connection Type | Integrated cable connection |
| Environmental Resistance | Resistant to vibration, temperature changes, industrial conditions |
| Frequency Response | Suitable for high-speed rotating machinery |
| Application Equipment | Turbines, compressors, generators, motors, pumps |
| Sensor Construction | Probe with integrated cable |
| Dimensions | Approx. 8 mm diameter × 85 mm probe length × 2000 mm cable length |
| Weight | Approx. 0.18 kg |
5. Product Application
5.1 Steam Turbine Monitoring
The 84933-02 is suitable for steam turbine condition monitoring applications.
Steam turbines operate at high rotational speeds, and small changes in rotor movement can indicate mechanical problems.
The sensor helps monitor:
- Shaft vibration
- Rotor displacement
- Bearing condition
- Mechanical alignment
- Operating stability
By continuously measuring shaft movement, operators can detect abnormal conditions early and reduce the possibility of unexpected equipment failure.
5.2 Gas Turbine Monitoring
Gas turbines require reliable monitoring components because they operate under extreme temperatures and high-speed rotation.
The 84933-02 provides stable shaft position measurement and supports equipment protection functions.
Typical monitoring functions include:
- Rotor vibration measurement
- Shaft movement detection
- Mechanical condition analysis
- Fault prediction
The sensor improves operational reliability and helps maintain safe turbine performance.
5.3 Compressor Condition Monitoring
Compressors are important rotating machines used in many industrial processes.
The 84933-02 provides continuous shaft movement information and helps identify mechanical abnormalities.
Typical applications include:
- Centrifugal compressors
- Process compressors
- High-speed compressors
The sensor helps detect:
- Rotor imbalance
- Shaft misalignment
- Bearing problems
- Excessive vibration
5.4 Generator Monitoring
Generators require continuous condition monitoring to maintain stable operation.
The sensor measures rotor displacement changes and vibration characteristics, providing important information for equipment evaluation.
Applications include:
- Power generation equipment
- Industrial generators
- Large rotating electrical machines
5.5 Industrial Pump Monitoring
Industrial pumps often operate continuously under heavy loads.
The 84933-02 can monitor shaft movement and detect abnormal mechanical conditions.
Typical problems that can be identified include:
- Bearing wear
- Coupling problems
- Shaft deformation
- Mechanical looseness
This improves maintenance efficiency and reduces unexpected downtime.
6. Product Advantages
6.1 High Accuracy Measurement
The 84933-02 provides accurate displacement measurement for rotating machinery.
It can detect small shaft movement changes, making it suitable for critical equipment protection applications.
6.2 Non-contact Operating Principle
The sensor operates without direct contact with the rotating shaft.
Main advantages include:
- Reduced mechanical wear
- Longer service life
- Stable measurement performance
- Lower maintenance requirements
6.3 Reliable Industrial Performance
The product is designed for continuous operation in demanding industrial environments.
It can maintain stable performance under:
- Mechanical vibration
- Temperature fluctuation
- Long operating periods
- Heavy industrial conditions
6.4 Supports Predictive Maintenance
The sensor provides continuous operating information that helps maintenance teams identify potential problems before equipment failure.
Benefits include:
- Reduced equipment downtime
- Improved maintenance scheduling
- Increased machinery reliability
- Better operational safety
6.5 Compact and Flexible Installation
The compact probe structure allows installation in different equipment configurations.
The standardized industrial design makes replacement and maintenance easier.
7. Recommended Same Series or Related Models
| Model | Product Type | Main Parameters | Dimensions | Weight (kg) | Application |
|---|---|---|---|---|---|
| 84933-02 | Proximity Sensor | 8 mm eddy current probe, 2 m cable, shaft displacement monitoring | Approx. 8 mm diameter × 85 mm probe × 2000 mm cable | 0.18 kg | General rotating machinery monitoring |
| 84933-01 | Proximity Sensor | 8 mm probe, shorter cable configuration, vibration measurement | Approx. 8 mm diameter × 85 mm probe × 1000 mm cable | 0.15 kg | Equipment vibration monitoring |
| 84661-70 | Proximity Sensor | 8 mm probe, 5 m cable, industrial displacement measurement | Approx. 8 mm diameter × 85 mm probe × 5000 mm cable | 0.25 kg | Turbine and compressor systems |
| 84661-82 | Proximity Sensor | 8 mm probe, 8 m cable, high accuracy displacement sensing | Approx. 8 mm diameter × 85 mm probe × 8000 mm cable | 0.32 kg | Machinery protection |
| 3300 XL 8mm Probe | Eddy Current Probe | High precision shaft vibration measurement | Approx. 8 mm diameter × 85 mm length | 0.23 kg | Turbine monitoring |
| 3300 XL Extension Cable | Extension Cable | Signal transmission extension component | Approx. 5 m cable length | 0.18 kg | Sensor installation extension |
8. Recommended Popular Models from the Same Brand
| Model | Product Type | Main Parameters | Dimensions | Weight (kg) | Application |
|---|---|---|---|---|---|
| 3500/42M | Vibration Monitoring Module | Four-channel vibration and displacement monitoring module | Approx. 120 mm × 50 mm × 120 mm | 0.45 kg | Machinery protection systems |
| 3300 XL 8mm Probe | Proximity Probe | 8 mm eddy current sensing probe, precision displacement measurement | Approx. 8 mm diameter × 85 mm length | 0.23 kg | Turbine and compressor monitoring |
| 3300 XL Proximitor Sensor | Signal Processing Module | Converts probe signal into monitoring output | Approx. 25 mm × 80 mm × 100 mm | 0.30 kg | Monitoring systems |
| 3500/22M | Data Interface Module | Machinery monitoring data communication interface | Approx. 120 mm × 50 mm × 120 mm | 0.40 kg | Industrial monitoring networks |
| 3500/25 | Keyphasor Module | Rotor speed and phase reference measurement | Approx. 120 mm × 50 mm × 120 mm | 0.42 kg | Rotating machinery synchronization |
9. Product Selection Summary
The 84933-02 is a compact and reliable proximity sensor designed for rotating machinery monitoring applications.
With its eddy current sensing technology, non-contact measurement structure, and stable signal performance, it provides accurate shaft displacement monitoring for industrial equipment.
The product is especially suitable for applications requiring:
- Reliable vibration monitoring
- Accurate shaft position measurement
- Continuous machine protection
- Predictive maintenance support
- Long-term industrial operation
The 84933-02 provides a practical monitoring solution for turbines, compressors, generators, pumps, and other rotating equipment.
Its reliable measurement capability helps improve equipment safety, reduce maintenance costs, and increase overall machine operating efficiency.