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- Vibration Transmitter
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Bently Nevada 990-04-XX-01 Proximity Transducer System Product Introduction, Technical Parameters, Applications and Advantages
1. Product Overview
Model: 990-04-XX-01
The Bently Nevada 990-04-XX-01 is a configurable industrial proximity transducer system designed for rotating machinery condition monitoring applications. The “XX” in the model number represents different configuration options, which may define probe length, cable arrangement, mechanical configuration, or installation requirements.
This product belongs to the 990 Series Proximity Transducer System, a product family developed for accurate shaft vibration measurement, displacement monitoring, and machinery protection applications.
The 990-04-XX-01 system uses eddy current non-contact measurement technology. It measures the distance between the probe tip and the rotating shaft surface without physical contact, allowing accurate detection of shaft movement while maintaining excellent durability and reliability.
The system is mainly used on critical rotating equipment where continuous monitoring is necessary. It provides important information about rotor behavior, vibration conditions, and mechanical stability.
Typical equipment applications include:
- Steam turbines
- Gas turbines
- Compressors
- Pumps
- Motors
- Generators
- High-speed rotating machinery
The 990-04-XX-01 is designed for industrial environments where accurate vibration monitoring, long service life, and stable signal performance are required.
2. Brand Information
Brand: Bently Nevada
Bently Nevada specializes in industrial machinery monitoring technology, focusing on vibration measurement, rotating equipment protection, and condition monitoring solutions.
The products are commonly used in industries where machinery reliability is critical.
Main application industries include:
- Power generation
- Petrochemical processing
- Oil and gas equipment
- Industrial manufacturing
- Heavy machinery operation
The product range includes:
- Proximity transducer systems
- Vibration sensors
- Machinery protection modules
- Condition monitoring devices
The brand is widely recognized for solutions used in continuous operation environments where equipment failure prevention is important.
3. Product Series Information
Product Series: 990 Series Proximity Transducer System
The 990 Series is an industrial proximity measurement product family designed for monitoring rotating shaft movement.
The series uses eddy current technology to provide accurate non-contact measurement.
The main purpose of the 990 Series is to provide reliable information about:
- Shaft vibration
- Shaft displacement
- Rotor movement
- Mechanical stability
The series is designed for applications requiring:
- Continuous operation
- High measurement accuracy
- Stable output signals
- Low maintenance
- Long operating life
The 990 Series proximity transducer systems are commonly installed on critical rotating machines where early detection of mechanical problems is necessary.
4. Product Description
The 990-04-XX-01 is a modular proximity transducer system designed for flexible industrial installation.
The product configuration allows different probe and cable options depending on machinery requirements.
The main components include:
- Proximity probe
- Extension cable assembly
- Connection components
The sensor detects shaft movement by measuring the electromagnetic field change between the probe tip and the rotating shaft.
Unlike traditional contact measurement devices, the system does not require physical contact with moving components.
This provides:
- Reduced mechanical wear
- Improved reliability
- Better measurement stability
- Longer service life
The system provides accurate information for machinery condition analysis and helps operators maintain equipment reliability.
5. Working Principle
The 990-04-XX-01 operates based on eddy current sensing technology.
The probe generates a high-frequency electromagnetic field around the sensing tip.
When the shaft position changes, the distance between the shaft and the probe changes the electromagnetic characteristics.
These changes are converted into electrical signals that represent shaft movement.
The monitoring system analyzes the signals to determine:
- Shaft vibration amplitude
- Rotor displacement
- Mechanical condition
- Abnormal operating behavior
The non-contact measurement principle makes the system suitable for high-speed rotating equipment.
6. Product Technical Parameters
| Parameter | Specification |
|---|---|
| Model | 990-04-XX-01 |
| Product Type | Proximity Transducer System |
| Product Series | 990 Series |
| Brand | Bently Nevada |
| Sensor Technology | Eddy Current Non-Contact Measurement |
| Measurement Type | Shaft vibration and displacement measurement |
| Sensor Type | Proximity Probe |
| Probe Diameter | Approximately 8 mm |
| Configuration Type | Modular configurable model |
| Installation Method | Threaded mounting installation |
| Measurement Target | Rotating shaft surface |
| Detection Principle | Electromagnetic distance measurement |
| Signal Output | Dynamic displacement signal |
| Application | Rotating machinery condition monitoring |
| Compatible Equipment | Turbines, compressors, pumps, motors, generators |
| Housing Material | Industrial stainless steel structure |
| Cable Configuration | Extension cable assembly |
| Operating Temperature | Approximately -35°C to +177°C depending on configuration |
| Measurement Accuracy | High precision shaft movement detection |
| Environmental Capability | Industrial environment operation |
| Dimensions | Approximate probe diameter 8 mm; overall length depends on selected XX configuration |
| Weight | Approximately 0.30 kg（kg） |
7. Product Features
Flexible Configuration Design
The XX designation allows different mechanical configurations to meet different installation requirements.
Different versions may provide variations in:
- Probe length
- Cable length
- Mounting requirements
- Mechanical arrangement
Accurate Shaft Monitoring
The product directly measures shaft movement, providing more accurate rotor information compared with general casing vibration monitoring.
Stable Long-Term Operation
The design supports continuous industrial operation with stable signal output.
It is suitable for equipment requiring:
- 24-hour operation
- High reliability
- Continuous condition monitoring
8. Product Applications
8.1 Turbine Monitoring
The 990-04-XX-01 is widely used for turbine shaft monitoring.
It helps detect:
- Rotor imbalance
- Shaft vibration increase
- Mechanical instability
- Bearing-related problems
Continuous monitoring helps improve turbine reliability and reduce unexpected shutdown risks.
8.2 Compressor Monitoring
Compressors often operate under high-speed conditions.
The product provides important information for monitoring:
- Rotor movement
- Shaft vibration
- Mechanical alignment
- Operating stability
8.3 Pump Applications
Industrial pumps require reliable monitoring to maintain production efficiency.
The system helps identify:
- Excessive vibration
- Shaft movement changes
- Mechanical wear
8.4 Motor and Generator Monitoring
Large motors and generators require stable operation.
The proximity transducer system provides shaft condition information for:
- Equipment protection
- Maintenance planning
- Condition evaluation
8.5 Industrial Machinery Protection
The product can be integrated into machinery monitoring systems for continuous equipment protection.
It supports:
- Early fault detection
- Predictive maintenance
- Equipment reliability improvement
9. Product Advantages
High Measurement Accuracy
The system provides accurate shaft displacement measurement through proven eddy current technology.
It can detect small shaft movement changes and provide valuable operating information.
Non-Contact Measurement
The sensor does not touch rotating components.
Advantages include:
- No mechanical friction
- Reduced wear
- Longer service life
- Stable performance
Excellent Environmental Adaptability
The product is designed for industrial environments involving:
- Mechanical vibration
- Temperature variation
- Continuous operation
Reliable Signal Output
The system provides stable measurement signals for machinery analysis.
This improves the accuracy of condition monitoring systems.
Supports Predictive Maintenance
The product helps maintenance teams identify equipment problems before serious damage occurs.
Benefits include:
- Reduced downtime
- Lower maintenance costs
- Improved equipment availability
Wide Application Range
The product can be applied to different types of rotating machinery.
Typical applications include:
- Power equipment
- Process machinery
- Industrial compressors
- Large rotating systems
10. Detailed Specification Table
| Technical Item | Specification |
|---|---|
| Model | 990-04-XX-01 |
| Series | 990 Series |
| Product Category | Machinery Condition Monitoring Sensor |
| Sensor Technology | Eddy Current Proximity Sensing |
| Probe Type | Non-contact displacement probe |
| Probe Diameter | Approx. 8 mm |
| Measurement Function | Shaft vibration and displacement monitoring |
| Installation Style | Industrial threaded mounting |
| Cable Type | Flexible extension cable |
| Signal Type | Dynamic vibration displacement signal |
| Operating Temperature | Approx. -35°C to +177°C |
| Housing Material | Industrial metal construction |
| Application Environment | Heavy industrial rotating machinery |
| Maintenance Requirement | Low maintenance |
| Dimensions | Approx. 8 mm probe diameter; length varies by XX configuration |
| Weight | Approx. 0.30 kg（kg） |
11. Recommended Same Series or Related Models
| Model | Product Type | Main Parameters | Application | Dimensions | Weight |
|---|---|---|---|---|---|
| 990-04-70-01-00 | Proximity Transducer System | 8 mm probe, standard shaft vibration measurement | Turbines and compressors | Approx. 8 mm probe diameter | Approx. 0.30 kg（kg） |
| 990-04-70-01-CN | Proximity Transducer System | 8 mm probe, industrial vibration monitoring | Rotating machinery protection | Approx. 8 mm probe diameter | Approx. 0.30 kg（kg） |
| 990-04-70-02-00 | Proximity Transducer System | 8 mm probe, shaft displacement measurement | Industrial machinery | Approx. 8 mm probe diameter | Approx. 0.30 kg（kg） |
| 990-04-90-01-05 | Proximity Transducer System | 8 mm probe configuration, enhanced shaft monitoring | Critical rotating equipment | Approx. 8 mm probe diameter | Approx. 0.30 kg（kg） |
| 3300 XL 8 mm Proximity Probe System | Proximity Sensor System | 8 mm eddy current sensor, high accuracy measurement | Turbines and compressors | Approx. 8 mm probe diameter | Approx. 0.35 kg（kg） |
12. Recommended Popular Models From The Same Brand
| Model | Product Type | Main Parameters | Application | Dimensions | Weight |
|---|---|---|---|---|---|
| 3300 XL 8 mm 330101 Series | Proximity Probe | 8 mm sensing diameter, high accuracy vibration monitoring | Turbines and compressors | Approx. 8 mm probe diameter | Approx. 0.35 kg（kg） |
| 3300 XL 11 mm Proximity Probe System | Large Shaft Proximity Probe | 11 mm probe design, large shaft monitoring | Heavy rotating equipment | Approx. 11 mm probe diameter | Approx. 0.45 kg（kg） |
| 3500/42M Vibration Monitor Module | Monitoring Module | Multi-channel vibration monitoring, machinery protection | Large rotating machinery | Rack-mounted structure | Approx. 0.80 kg（kg） |
| 3500/22M Interface Module | Interface Module | Data acquisition and communication functions | Monitoring systems | Standard rack module size | Approx. 1.00 kg（kg） |
| 1900/65A Machinery Monitoring System | Compact Monitoring Device | Multi-input vibration monitoring | Small and medium machinery | Compact panel design | Approx. 0.50 kg（kg） |
13. Product Comparison Table
| Model | Series | Technology | Main Feature | Dimensions | Weight |
|---|---|---|---|---|---|
| 990-04-XX-01 | 990 Series | Eddy Current Technology | Configurable shaft monitoring solution | Approx. 8 mm probe diameter | Approx. 0.30 kg（kg） |
| 990-04-70-01-00 | 990 Series | Eddy Current Technology | Standard proximity monitoring | Approx. 8 mm probe diameter | Approx. 0.30 kg（kg） |
| 990-04-90-01-05 | 990 Series | Eddy Current Technology | Precision shaft measurement | Approx. 8 mm probe diameter | Approx. 0.30 kg（kg） |
| 3300 XL 8 mm | 3300 XL Series | Eddy Current Technology | High accuracy industrial monitoring | Approx. 8 mm probe diameter | Approx. 0.35 kg（kg） |
| 3500/42M | 3500 Series | Digital Monitoring Technology | Advanced machinery protection | Rack module design | Approx. 0.80 kg（kg） |
14. Product Summary
The 990-04-XX-01 proximity transducer system is a flexible and reliable industrial monitoring solution designed for rotating machinery applications.
As a member of the 990 Series, it provides accurate shaft vibration and displacement measurement through non-contact eddy current technology.
The main advantages include:
- High measurement accuracy
- Non-contact operation
- Stable signal performance
- Long service life
- Low maintenance requirements
- Wide industrial application capability
The product is suitable for turbines, compressors, pumps, motors, generators, and other critical rotating equipment.
Through continuous monitoring of shaft movement and vibration conditions, the 990-04-XX-01 helps improve equipment reliability, reduce unexpected failures, optimize maintenance strategies, and support safer industrial operation.