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- Bently Nevada
- 330909-20-70-10-11-05
- 3300 NSv Proximity Probe
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Bently Nevada 330909-20-70-10-11-05 Proximity Sensor Detailed Product Introduction
1. Product Model
Bently Nevada 330909-20-70-10-11-05
The 330909-20-70-10-11-05 is a high-precision eddy current proximity sensor designed for industrial rotating machinery condition monitoring applications. It belongs to the 3300 XL Proximity Transducer System Series and is widely used for measuring shaft vibration, shaft displacement, radial movement, and mechanical position changes in critical rotating equipment.
The sensor adopts non-contact eddy current measurement technology, allowing continuous monitoring of rotating shafts without physical contact. It converts the distance variation between the probe tip and the rotating shaft target surface into an electrical signal, providing accurate and reliable information for machine protection, fault diagnosis, and predictive maintenance.
The 330909-20-70-10-11-05 is designed for demanding industrial environments where high reliability, long operating life, and accurate measurement performance are required. It is commonly applied in turbines, compressors, generators, pumps, and other high-speed rotating machinery.
2. Product Basic Specifications
| Parameter | Specification |
|---|---|
| Model | 330909-20-70-10-11-05 |
| Product Type | Eddy Current Proximity Sensor |
| Product Series | 3300 XL Proximity Transducer System Series |
| Measurement Principle | Eddy current non-contact measurement |
| Main Measurement Functions | Shaft vibration, shaft displacement, position monitoring |
| Probe Diameter | 8 mm |
| Measurement Method | Non-contact electromagnetic sensing |
| Standard Sensitivity | Approximately 7.87 V/mm |
| Linear Measurement Range | Approximately 2 mm |
| Output Signal | Analog voltage proportional to gap distance |
| Operating Temperature Range | Approximately -40°C to +177°C (depending on configuration) |
| Installation Method | Threaded mounting |
| Probe Thread Size | 3/8-24 UNF |
| Cable Configuration | Integrated extension cable configuration |
| Cable Length | Approximately 2 meters according to model configuration |
| Signal Stability | High repeatability and long-term stability |
| Environmental Capability | Suitable for industrial vibration and temperature environments |
| System Compatibility | Designed for online machinery monitoring systems |
| Application Equipment | Turbines, compressors, generators, pumps, rotating machinery |
| Probe Diameter Dimension | Approximately 8 mm |
| Overall Dimension | Approx. 2000 mm including cable configuration |
| Weightkg（ ） | Approx. 0.15 kg |
3. Model Number Explanation
The model number 330909-20-70-10-11-05 contains different configuration codes representing the sensor structure, cable arrangement, mounting style, and application options.
| Model Code | Description |
|---|---|
| 330909 | 3300 XL 8 mm proximity sensor family |
| -20 | Probe length and mechanical configuration option |
| -70 | Cable and connector configuration |
| -10 | Standard probe configuration |
| -11 | Mounting and installation option |
| -05 | Additional configuration option |
4. Product Introduction
The 330909-20-70-10-11-05 is a critical sensing component used in industrial machinery protection and condition monitoring systems.
The sensor operates based on the eddy current principle. A high-frequency electromagnetic field is generated at the probe tip. When a conductive rotating shaft moves closer or farther away from the probe, the electromagnetic field changes. The monitoring system analyzes these changes and calculates shaft position or vibration displacement.
Unlike contact-type sensors, this proximity sensor does not physically touch the rotating shaft. This eliminates mechanical wear, improves measurement stability, and allows continuous operation in harsh industrial environments.
The product provides reliable monitoring data for detecting abnormal machine conditions such as excessive vibration, shaft misalignment, bearing problems, rotor instability, and mechanical clearance changes.
5. Product Applications
5.1 Steam Turbine Monitoring
The product is widely used in steam turbine protection systems.
Steam turbines operate at extremely high speeds, and even small shaft movement changes can indicate potential mechanical problems. The 330909 sensor continuously measures shaft vibration and displacement to support early fault detection.
5.2 Compressor Condition Monitoring
Large industrial compressors require continuous and reliable operation.
The sensor monitors rotor movement, vibration levels, and shaft position changes, helping prevent unexpected equipment failures and improving operational safety.
5.3 Generator Protection
Large generators require accurate shaft monitoring to maintain stable operation.
The 330909-20-70-10-11-05 provides accurate shaft displacement information and supports protection systems used in power generation equipment.
5.4 Pump Monitoring
Industrial pumps operating under continuous load may experience shaft wear, imbalance, or alignment issues.
The sensor helps detect abnormal shaft movement and supports preventive maintenance programs.
5.5 Industrial Rotating Machinery
The product is also suitable for:
- Gas turbines
- Centrifugal machines
- Fans
- Blowers
- Marine propulsion equipment
- Heavy industrial rotating equipment
6. Product Advantages
| Advantage | Detailed Description |
|---|---|
| High Measurement Accuracy | Detects very small shaft movement changes with excellent precision |
| Non-Contact Operation | Eliminates mechanical wear between sensor and rotating shaft |
| Long Service Life | Designed for continuous industrial operation |
| Excellent Stability | Provides consistent measurement output over long periods |
| Fast Response | Suitable for high-speed rotating machinery monitoring |
| Strong Environmental Resistance | Performs reliably under industrial temperature and vibration conditions |
| Low Maintenance Requirement | No physical contact reduces maintenance frequency |
| Easy Integration | Compatible with industrial monitoring systems |
| Reliable Fault Detection | Helps identify abnormal machine conditions early |
| Wide Industrial Application | Used in power, petrochemical, manufacturing, and energy industries |
7. Brand Information
| Item | Description |
|---|---|
| Brand | Bently Nevada |
| Product Field | Industrial machinery monitoring and protection |
| Main Technologies | Vibration monitoring, proximity measurement, predictive maintenance |
| Typical Industries | Power generation, oil & gas, petrochemical, manufacturing |
8. Product Series Information
| Item | Description |
|---|---|
| Series | 3300 XL Proximity Transducer System |
| Series Type | Industrial proximity sensing system |
| Main Products | Proximity probes, extension cables, monitoring modules |
| Main Functions | Shaft vibration measurement, displacement monitoring, machine protection |
| Typical Applications | Critical rotating equipment monitoring |
9. Recommended Related Models from the Same Series
| Model | Main Parameters | Application | Dimension | Weightkg（ ） |
|---|---|---|---|---|
| 330101-00-08-10-02-00 | 8 mm proximity probe, standard eddy current technology, high stability output | Shaft vibration monitoring | Probe diameter approx. 8 mm, length approx. 100 mm | Approx. 0.12 kg |
| 330103-00-05-10-02-00 | 8 mm probe with 5 m extension cable configuration | Large machine installation applications | Cable length approx. 5 m | Approx. 0.30 kg |
| 330104-00-10-10-02-00 | Standard 3300 XL proximity sensor configuration | Rotating equipment protection | Approx. 8 mm probe structure | Approx. 0.15 kg |
| 330130-040-00-00 | XL series proximity probe for precision displacement measurement | Shaft position monitoring | Probe diameter approx. 8 mm | Approx. 0.16 kg |
| 330180-50-00 | XL series extension component | Flexible installation requirements | Length depends on configuration | Approx. 0.25 kg |
10. Recommended Popular Models from the Same Brand
| Model | Main Parameters | Product Type | Dimension | Weightkg（ ） |
|---|---|---|---|---|
| 3500/42M | Four-channel vibration monitoring module, supports machinery protection functions | Vibration Monitoring Module | Standard rack module size | Approx. 0.70 kg |
| 3500/22M | Transient data interface module, high-speed data acquisition capability | Data Interface Module | Standard monitoring rack size | Approx. 0.50 kg |
| 3300 XL 8mm 330101 Series | 8 mm eddy current proximity sensor for shaft vibration measurement | Proximity Probe | Diameter approx. 8 mm | Approx. 0.15 kg |
| 1900/65A | General-purpose machinery protection monitor | Monitoring Device | Approx. 100 × 120 × 80 mm | Approx. 1.20 kg |
| 2300 Series Vibration Monitor | Two-channel vibration monitoring solution | Vibration Monitor | Approx. 100 × 120 × 80 mm | Approx. 0.80 kg |
11. Product Summary
The Bently Nevada 330909-20-70-10-11-05 is a high-performance industrial proximity sensor designed for critical rotating machinery monitoring applications.
With advanced eddy current measurement technology, excellent signal stability, and proven industrial reliability, this sensor provides accurate shaft vibration and displacement measurements for demanding operating environments.
It is especially suitable for applications where equipment reliability, operational safety, and predictive maintenance are essential, including turbines, compressors, generators, and other large rotating machines.
The product remains an important component in modern machinery protection systems due to its accuracy, durability, and ability to provide continuous condition monitoring data.