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- Bently Nevada
- 330851-02-000-040-50-00-05
- 3300 XL 25 mm Proximity Probe
- USA
- 5 meters
- 0.41 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Bently Nevada 330851-02-000-040-50-00-05 is a 3300 XL 25 mm Proximity Probe used for non-contact measurement of shaft position and movement in rotating machinery. It forms part of a proximity measurement system in which the probe monitors the relative position of a conductive machine target, typically a rotating shaft.
The 25 mm probe format is suited to machinery installations where a longer sensing reach or a specific mounting arrangement is required. It can be applied to equipment such as turbines, compressors, pumps, and other rotating machines where shaft vibration, axial position, or related mechanical movement needs to be monitored continuously.
During operation, the probe works with the associated Proximitor sensor and extension cable. The probe generates an electrical response according to the changing distance between its sensing tip and the machine target. The associated electronics then convert this response into a signal that can be processed by the machinery monitoring system.
Correct probe installation is critical to the measurement loop. Probe position, target condition, gap setting, cable routing, and compatibility with the associated Proximitor sensor should all be checked during commissioning and maintenance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 330851-02-000-040-50-00-05 |
| Product Family | 3300 XL |
| Product Type | 3300 XL 25 mm Proximity Probe |
| Measurement Principle | Non-contact proximity measurement |
| Application | Rotating machinery shaft vibration and position monitoring |
| System Role | Shaft displacement and position sensing |
| Sensing Target | Conductive rotating machine target |
| Associated System | Bently Nevada Proximitor and machinery monitoring system |
| Total Length | 5 meters |
| Weight | 0.41 kg |
Product Features
- Part of the Bently Nevada 3300 XL proximity measurement platform.
- Provides non-contact sensing of rotating machinery shaft movement.
- Suitable for shaft vibration and position monitoring applications.
- Uses eddy-current proximity measurement technology with the associated Proximitor sensor.
- Suitable for turbines, compressors, pumps, and other rotating machinery.
- Supports continuous machinery condition monitoring.
- Long probe assembly configuration suited to installations requiring extended physical reach.
Working Principle
The 330851-02-000-040-50-00-05 operates as the sensing element in an eddy-current proximity measurement system. The probe is positioned near a conductive shaft or other suitable machine target without making physical contact.
As the target moves relative to the probe tip, the electrical characteristics of the sensing field change. The associated Proximitor sensor detects this change and converts it into a usable output representing shaft movement.
Rotating Shaft / Conductive Target → 3300 XL Proximity Probe → Proximitor Sensor → Machinery Monitoring System
This measurement arrangement can be used to observe shaft vibration, axial position, or other relative displacement depending on the installation and monitoring configuration. Accurate probe gap and mechanical positioning are essential for obtaining a correctly scaled measurement.
Role in a Rotating Machinery Proximity Monitoring Architecture
The 330851-02-000-040-50-00-05 occupies the machine-side sensing layer of a proximity monitoring architecture. It directly observes the relative movement between the probe and the conductive target, while the Proximitor and monitoring system handle signal conditioning and analysis.
| System Element | Function |
|---|---|
| 330851-02-000-040-50-00-05 | Detects relative movement between the probe and conductive target |
| Rotating Shaft / Target | Provides the conductive measurement surface |
| Extension Cable | Connects the probe with the associated Proximitor sensor |
| Proximitor Sensor | Supplies the probe system and converts the probe response into a monitoring signal |
| Machinery Monitoring System | Processes shaft vibration or position information |
| HMI / Control System | Displays, trends, and acts on configured monitoring values |
Industrial Applications
| Application | Typical Use |
|---|---|
| Steam Turbines | Shaft vibration and axial position monitoring |
| Gas Turbines | Continuous rotating-shaft condition monitoring |
| Compressors | Monitoring shaft movement and vibration |
| Pumps | Non-contact shaft vibration measurement |
| Motors | Monitoring shaft movement where proximity measurement is required |
| Industrial Rotating Equipment | Continuous machinery condition monitoring and protection |
Installation and Maintenance
- Verify the 330851-02-000-040-040-50-00-05 model against the intended Bently Nevada proximity measurement configuration before installation.
- Confirm that the associated Proximitor sensor and monitoring channel are compatible with the probe assembly.
- Inspect the probe tip and cable assembly for damage before installation.
- Install the probe in the designated mounting location without applying excessive mechanical force to the assembly.
- Position the probe relative to the conductive shaft target according to the applicable installation procedure.
- Set and verify the required probe gap before commissioning the measurement channel.
- Keep the cable properly supported and avoid excessive bending or mechanical stress.
- Route the probe cable away from sources of mechanical damage and unnecessary electrical interference.
- Check all probe and Proximitor connections for secure termination.
- Verify the output signal and monitoring-system scaling after installation.
- During preventive maintenance, inspect the probe tip, mounting arrangement, cable, and connections for deterioration.
- If the measurement becomes unstable or abnormal, check the probe gap, target surface, cable, Proximitor, and monitoring channel before replacing the probe.
Related Components
| Component | Function |
|---|---|
| Bently Nevada 3300 XL Proximitor Sensor | Supplies and conditions the proximity probe signal |
| Proximity Probe Cable | Connects the probe to the associated Proximitor sensor |
| Rotating Shaft / Target | Provides the conductive target for non-contact measurement |
| Machinery Monitoring System | Processes vibration and shaft-position measurements |
| Signal Interface | Transfers the conditioned measurement to the monitoring or control system |
| Probe Mounting Hardware | Positions and secures the proximity probe at the measurement point |
Recommended Related Models
| Model | Product Type | Typical Application |
|---|---|---|
| Bently Nevada 330851-02-000-040-50-00-05 | 3300 XL 25 mm Proximity Probe | Shaft vibration and position monitoring |
| Bently Nevada 3300 XL Proximitor Sensor | Proximitor Sensor | Proximity signal conditioning |
| Bently Nevada 990-08-50-01-00 | 990 Vibration Transmitter | Continuous vibration monitoring |
| Bently Nevada 3500 Series | Machinery Monitoring System | Centralized machinery condition monitoring |
Key Advantages
- Provides non-contact measurement of rotating shaft movement.
- Suitable for vibration and shaft-position monitoring applications.
- Part of the established Bently Nevada 3300 XL proximity measurement architecture.
- Supports continuous monitoring of turbines, compressors, pumps, and other rotating equipment.
- Long probe assembly configuration supports installations requiring extended physical reach.
- Integrates with the associated Proximitor and machinery monitoring system.
Technical FAQs
What does the Bently Nevada 330851-02-000-040-50-00-05 measure?
The probe measures the relative movement between its sensing tip and a conductive machine target. Depending on the monitoring configuration, this measurement can be used for shaft vibration, axial position, or related displacement monitoring.
Does the 330851-02-000-040-50-00-05 operate by itself?
No. The proximity probe forms part of a complete measurement system and normally operates with the appropriate Proximitor sensor and monitoring equipment. The Proximitor provides the electrical interface and conditions the probe response for the monitoring system.
Why is probe gap adjustment important?
The probe gap establishes the operating point of the proximity measurement. An incorrect gap can affect signal amplitude, measurement scaling, and the usable monitoring range, so the gap should be set according to the applicable installation procedure.
What should be checked if the probe signal becomes unstable?
Check the probe mounting, probe gap, target surface, cable condition, Proximitor connections, and monitoring-system input. Mechanical movement of the probe or damage to the cable can also introduce abnormal readings and should be investigated before replacing the probe.