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- Bently Nevada
- 30004-02-12-18-02
- Proximity Probe
- USA
- 18 feet
- 3 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Bently Nevada 30004-02-12-18-02 is a proximity probe used in non-contact displacement measurement systems for rotating machinery. It detects changes in the distance between its sensing tip and a conductive target, allowing compatible monitoring equipment to measure shaft movement and relative position during machine operation.
In industrial machinery, proximity probes are commonly installed near bearings, where the distance between the probe and the shaft provides information about rotor movement. Unlike contact-based sensors, the probe does not need to touch the rotating surface. This makes proximity measurement suitable for continuously operating compressors, turbines, pumps, and other machines where shaft vibration and position are important operating parameters.
The 30004-02-12-18-02 is identified as a vibration-monitoring proximity probe. Its configuration includes an 18-foot cable option, making cable routing and transducer compatibility important considerations when incorporating it into an existing monitoring installation. The probe works as part of a complete measurement circuit rather than as a standalone monitoring instrument.
For example, a centrifugal compressor may use proximity probes to monitor shaft movement near its bearing assemblies. The probe responds to changes in the gap between the sensing tip and the shaft, while the associated signal-conditioning electronics convert that response into a measurement that can be evaluated by the machinery monitoring system.
The probe is relevant to maintenance applications where an existing proximity measurement channel requires a compatible replacement. Correct selection involves more than matching the connector: the probe, cable arrangement, signal conditioner, and monitoring channel must operate as a compatible system.
The physical mounting arrangement also affects the quality of the measurement. The probe must be installed at the intended measurement location, with the appropriate sensing gap and secure mechanical support. A loose mounting point, damaged cable, or disturbed probe position can introduce abnormal readings that resemble changes in shaft condition.
The 30004-02-12-18-02 therefore serves as the sensing component in a machinery measurement channel. It supplies information about relative movement, while signal processing, trend analysis, alarm evaluation, and protective actions are handled by the associated instrumentation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 30004-02-12-18-02 |
| Product Type | Proximity Probe |
| Product Application | Machinery vibration and displacement monitoring |
| Sensing Principle | Eddy-current proximity sensing |
| Cable Length Option | 18 feet |
| Primary Function | Non-contact measurement of target displacement |
| Typical Installation | Rotating machinery shaft and bearing monitoring |
| Total Length | Optional |
| Shipping Weight | 3 kg |
Product Features
- Non-contact displacement measurement: Detects changes in the gap between the probe tip and a conductive target.
- Vibration monitoring application: Supplies a sensing signal for compatible rotating machinery monitoring systems.
- 18-foot cable option: Supports installations requiring the specified cable configuration.
- Continuous measurement support: Provides a probe signal while the connected transducer system is operating.
- Transducer system integration: Works with compatible signal-conditioning electronics and monitoring equipment.
- Replacement component application: Supports maintenance of existing installations requiring the corresponding probe reference.
- Industrial machinery use: Suitable for compatible proximity measurement arrangements on compressors, turbines, pumps, and other rotating equipment.
Working Principle
The 30004-02-12-18-02 operates through an eddy-current sensing circuit. When the probe is positioned near a conductive target, its electromagnetic field interacts with the target surface. Changes in the distance between the probe tip and the target alter the electrical response of the sensing circuit.
Conductive Shaft → Proximity Probe → Signal-Conditioning Electronics → Machinery Monitoring System
During operation, the rotating shaft moves relative to the stationary bearing structure. The probe detects changes in the sensing gap, and its electrical response is passed to compatible signal-conditioning electronics. These electronics process the probe signal into a measurement that can be evaluated by the monitoring equipment.
In shaft vibration applications, the resulting measurement represents changes in the relative position of the shaft and probe. The monitoring system can use the signal to assess dynamic shaft movement and, where supported, static position. Interpretation depends on the probe installation, the connected electronics, and the configured monitoring channel.
The cable forms part of the complete transducer circuit. Its electrical characteristics affect the system response, so the specified probe and cable arrangement must be compatible with the associated signal conditioner. A cable that fits physically but does not match the required electrical configuration can affect measurement performance.
The probe itself does not calculate vibration severity, analyze machine condition, or issue shutdown commands. Those functions belong to the connected monitoring and protection equipment. The probe supplies the measurement input used by the wider system.
If a signal changes unexpectedly after maintenance, technicians should examine the sensing gap, probe mounting, connector condition, cable routing, and signal-conditioning electronics. This helps distinguish an instrumentation problem from actual shaft movement.
Role in the Machinery Monitoring Architecture
The Bently Nevada 30004-02-12-18-02 forms the sensing stage of a proximity measurement channel. It detects relative movement between the probe and a conductive target, allowing compatible electronics to provide measurement data to the machinery monitoring system.
Machine Shaft → Proximity Probe → Signal Conditioner → Monitoring Module → Plant Monitoring System
| System Component | Function |
|---|---|
| Bently Nevada 30004-02-12-18-02 | Detects changes in the probe-to-target gap |
| Probe Mounting Hardware | Maintains the required position relative to the target |
| Compatible Cable Arrangement | Connects the probe to the associated transducer circuit |
| Signal-Conditioning Electronics | Processes the probe response into a measurement signal |
| Machinery Monitoring Module | Receives and evaluates the measurement |
| Bearing Assembly | Supports the shaft and establishes the mechanical reference |
| Rotating Shaft | Provides the conductive target for proximity sensing |
| Monitoring Software | Displays measurements and supports trend analysis |
| Machinery Protection System | Applies configured alarm and protection functions through the appropriate monitoring architecture |
Industrial Applications
| Application | Typical Use |
|---|---|
| Centrifugal Compressors | Monitoring shaft movement near bearing locations |
| Steam Turbines | Measuring relative shaft position in compatible monitoring installations |
| Gas Turbines | Providing proximity measurements at designated shaft locations |
| Industrial Pumps | Monitoring shaft displacement and vibration |
| Power Generation Equipment | Supplying measurements for rotating machinery condition assessment |
| Petrochemical Plants | Maintaining proximity measurement channels on critical rotating equipment |
| Refinery Machinery | Supporting shaft monitoring on compressors and pumps |
| Process Machinery | Providing non-contact measurements for compatible rotating assemblies |
| Machinery Maintenance | Replacing a probe in an existing compatible measurement channel |
| Continuous-Operation Facilities | Supporting ongoing machinery condition monitoring |
Installation and Maintenance
- Verify the probe reference: Confirm that the required component is Bently Nevada 30004-02-12-18-02.
- Inspect the mounting point: Check the probe holder, mounting threads, and surrounding structure for damage or contamination.
- Prepare the equipment safely: Follow the site’s machinery isolation procedures before working near rotating components.
- Check the target surface: Ensure that the probe faces the intended conductive target and that the installation location is suitable for the measurement.
- Set the sensing gap: Establish the required probe-to-target clearance according to the applicable transducer installation procedure.
- Secure the probe: Install the probe without damaging its sensing tip, threaded case, or mounting hardware.
- Route the cable: Prevent crushing, sharp bends, abrasion, and contact with hot or moving machine components.
- Inspect the connector: Check for contamination, damage, and secure engagement with the associated cable or electronics.
- Verify system compatibility: Confirm that the probe, cable arrangement, and signal conditioner are suitable for the intended measurement channel.
- Check the electrical response: Follow the applicable commissioning procedure to verify the probe signal and measurement behavior.
- Review the monitoring channel: Confirm that the connected equipment displays a plausible measurement under the applicable operating conditions.
- Record the maintenance work: Document the probe reference, installation details, measurement checks, and any abnormalities identified during commissioning.
Related Components
| Component | Function |
|---|---|
| Bently Nevada 30004-02-12-18-02 | Proximity probe for compatible displacement measurement |
| Compatible Proximitor Sensor | Processes the probe response into a usable measurement signal |
| Compatible Extension Cable | Provides the electrical connection required by the transducer configuration |
| Probe Mounting Hardware | Holds the probe in the required measurement position |
| Machinery Monitoring Module | Receives and evaluates the conditioned signal |
| Bently Nevada 3300 Series Monitoring Equipment | Supports compatible machinery monitoring applications |
| Bently Nevada 3500 Series Monitoring System | Processes supported transducer measurements through installed monitoring modules |
| Machinery Monitoring Software | Supports measurement display, trend review, and diagnostic analysis |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Bently Nevada 30004-02-12-18-02 | Proximity Probe | Replacement in a compatible existing installation |
| Bently Nevada 3300 XL 8 mm Proximity Probe | Proximity Probe | Shaft vibration and position measurement in compatible transducer systems |
| Bently Nevada 3300 XL 8 mm Extension Cable | Extension Cable | Probe-to-sensor connection in compatible 3300 XL systems |
| Bently Nevada 3300 XL 8 mm Proximitor Sensor | Signal-Conditioning Sensor | Processing compatible probe signals |
| Bently Nevada 3500 Series | Machinery Protection System | Monitoring supported vibration and position measurements |
Key Advantages
- Supports non-contact shaft displacement measurement.
- Supplies a sensing signal for compatible machinery vibration monitoring systems.
- Integrates with suitable signal-conditioning electronics and monitoring equipment.
- Supports replacement and maintenance of compatible proximity measurement channels.
- Can be used in suitable compressor, turbine, pump, and other rotating machinery installations.
Technical FAQs
What does the 18-foot cable option mean for installation?
It identifies the cable-length configuration associated with the probe. Cable routing and the electrical requirements of the complete transducer system should be considered when installing or replacing the component.
Does the probe measure shaft vibration directly?
The probe detects changes in the distance between its sensing tip and the conductive shaft. The connected monitoring equipment processes this signal to determine supported vibration and position measurements.
Can the 30004-02-12-18-02 replace a probe from another Bently Nevada series?
Not automatically. Probe electrical characteristics, cable configuration, signal-conditioning requirements, and mounting details must be compatible with the intended measurement channel. Similar appearance or connector style alone does not establish interchangeability.
What should be checked if the measurement is abnormal after installation?
Inspect the probe mounting and sensing gap, cable routing, connector condition, and signal-conditioning electronics. These factors can affect the signal independently of the actual mechanical condition of the shaft.