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- Bently Nevada
- 330851-04-000-040-10-01-00
- 3300 XL 25 mm Proximity Probe
- USA
- 1 meter
- 0.33 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Bently Nevada 330851-04-000-040-10-01-00 is a 3300 XL 25 mm Proximity Probe used for non-contact measurement of shaft position and movement in rotating machinery. It belongs to the Bently Nevada 3300 XL proximity measurement family, where the probe works together with the associated extension cable and Proximitor Sensor to form a complete eddy-current measurement channel.
The probe is installed close to a conductive machine target, typically a rotating shaft or other suitable metallic surface. As the target moves relative to the probe, the probe generates a changing electrical response that is processed by the connected Proximitor Sensor. This arrangement allows machinery-monitoring systems to observe relative shaft movement without physical contact between the probe tip and the monitored surface.
In a typical installation, the probe is mounted through a suitable mechanical support and positioned toward the monitored shaft. The probe, extension cable, and Proximitor Sensor must be treated as a matched measurement chain during installation and maintenance. Proper mechanical mounting and electrical connection are important because probe position directly affects the resulting measurement.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Product Model | 330851-04-000-040-10-01-00 |
| Product Type | 3300 XL 25 mm Proximity Probe |
| Product Family | 3300 XL |
| Series | 3300 XL Proximity Measurement System |
| Measurement Principle | Eddy-current proximity measurement |
| Measurement Method | Non-contact sensing |
| Target Type | Conductive machine target |
| Primary Function | Shaft position and relative movement measurement |
| System Integration | Proximitor Sensor and associated extension cable |
| Application | Rotating Machinery Condition Monitoring |
| Installation | Machine-mounted proximity sensing |
| Total Length | 1 meter |
| Weight | 0.33 kg |
Product Features
- Part of the Bently Nevada 3300 XL proximity measurement system.
- Provides non-contact sensing for rotating machinery applications.
- Uses an eddy-current sensing principle to detect changes in the position of a conductive target.
- Suitable for monitoring relative shaft movement within machinery monitoring systems.
- Works as part of a probe, extension cable, and Proximitor Sensor measurement chain.
- Intended for installation near the monitored machine target without direct physical contact.
- Suitable for machinery condition monitoring and protection applications.
- Can be used where continuous observation of shaft behavior is required.
- Supports measurement architectures used on rotating equipment such as turbines, compressors, pumps, and other critical machinery.
- Requires correct mechanical positioning and compatible system components for proper measurement performance.
Working Principle
The 330851-04-000-040-10-01-00 operates using the eddy-current proximity measurement principle. The probe establishes an electromagnetic field at its sensing tip. When a conductive target such as a machine shaft enters this field, the electrical characteristics of the probe circuit change according to the relative position between the probe and target.
The probe itself does not independently interpret the measured signal. Instead, it forms the sensing portion of the measurement chain and connects through the appropriate extension cable to a Bently Nevada Proximitor Sensor.
A typical signal path is:
Rotating shaft → 3300 XL 25 mm Proximity Probe → Extension Cable → Proximitor Sensor → Monitoring / Protection System
During operation, changes in the shaft-to-probe relationship produce corresponding changes in the electrical signal delivered to the Proximitor Sensor. The downstream monitoring system can then use the processed signal for machinery condition monitoring, protection, and diagnostic functions.
Because the probe operates without mechanical contact with the shaft, it can monitor relative movement while avoiding physical wear between the sensing element and the rotating target.
Role in a Bently Nevada Rotating Machinery Monitoring Architecture
The 330851-04-000-040-10-01-00 serves as the machine-side sensing element within a Bently Nevada proximity measurement channel. It is positioned close to the monitored target and transfers the detected proximity information through the extension cable to the Proximitor Sensor.
| System Layer | Typical Component | Function |
|---|---|---|
| Machinery | Turbine / Compressor / Pump / Motor | Provides the rotating mechanical target |
| Sensing | 3300 XL 25 mm Proximity Probe | Detects relative target position without contact |
| Signal Connection | Extension Cable | Connects the probe to the Proximitor Sensor |
| Signal Conditioning | Proximitor Sensor | Converts the probe response into a usable measurement signal |
| Monitoring | Machinery Monitoring System | Receives and evaluates the measurement |
| Protection | Machinery Protection System | Uses monitored parameters for equipment protection functions |
Industrial Applications
| Application | Probe Role |
|---|---|
| Steam Turbines | Monitors relative shaft movement as part of a proximity measurement channel |
| Gas Turbines | Supports non-contact shaft monitoring within machinery protection systems |
| Compressors | Provides proximity sensing for rotating shaft monitoring |
| Pumps | Supports monitoring of shaft behavior in rotating equipment |
| Generators | Used as part of a machinery vibration and shaft-position monitoring arrangement |
| Motors | Provides non-contact measurement of rotating machine targets |
| Industrial Rotating Equipment | Supports continuous machinery condition monitoring architectures |
| Predictive Maintenance Systems | Supplies proximity measurement data for machinery condition assessment |
Installation and Maintenance
- Confirm that the probe model and associated measurement components match the intended Bently Nevada monitoring channel before installation.
- Verify the mechanical mounting arrangement and ensure the probe can be positioned correctly relative to the monitored target.
- Inspect the probe body, sensing tip, connector, and cable interface for visible damage before installation.
- Ensure the mounting hardware is clean and free from contamination that could affect mechanical positioning.
- Install the probe according to the applicable machinery and monitoring-system documentation.
- Maintain the required probe-to-target relationship specified for the particular measurement application.
- Avoid physical contact between the probe tip and the rotating machine target during installation and operation.
- Route the associated extension cable so that it is protected from excessive mechanical stress, abrasion, and interference.
- Verify that the probe and extension cable connections are fully seated and mechanically secured.
- Check the complete probe circuit before placing the machinery monitoring channel into service.
- During maintenance, inspect for loose mounting, connector damage, contamination, or changes in probe positioning.
- After replacement or adjustment, verify the measurement channel and compare the resulting signal with the expected machinery operating condition.
Related Components
| Component | Function in the System |
|---|---|
| Bently Nevada Proximitor Sensor | Provides signal conditioning for the proximity probe |
| 3300 XL Extension Cable | Connects the probe to the Proximitor Sensor |
| 3300 XL Proximity Probes | Related sensing elements for non-contact machinery measurement |
| Probe Mounting Hardware | Positions the proximity probe relative to the machine target |
| Machinery Monitoring System | Receives and evaluates the processed proximity signal |
| Machinery Protection System | Uses monitoring information for equipment protection |
| Rotating Shaft | Conductive machine target monitored by the proximity probe |
Recommended Related Models
| Model | Product Type | Typical Relationship |
|---|---|---|
| Bently Nevada 330101 Series | 3300 XL 8 mm Proximity Probe | Related 3300 XL proximity probe family |
| Bently Nevada 330102 Series | 3300 XL 8 mm Proximity Probe | Related proximity sensing family |
| Bently Nevada 330103 Series | 3300 XL 11 mm Proximity Probe | Related 3300 XL proximity probe family |
| Bently Nevada 3300 XL Extension Cable Series | Proximity Probe Extension Cable | Associated cable family for probe connections |
| Bently Nevada 3300 XL Proximitor Sensor Series | Proximity Signal Conditioning Component | Associated electronics for the probe measurement chain |
Key Advantages
- Provides non-contact measurement for rotating machinery applications.
- Forms part of the established Bently Nevada 3300 XL proximity measurement architecture.
- Supports shaft movement and position monitoring without physical contact.
- Integrates with an extension cable and Proximitor Sensor as part of a complete measurement channel.
- Suitable for continuous machinery monitoring and protection applications.
- Useful for maintenance and replacement work on established Bently Nevada monitoring systems.
Technical FAQs
What is the function of the Bently Nevada 330851-04-000-040-10-01-00?
It is a 3300 XL proximity probe used as the machine-side sensing element in a non-contact eddy-current measurement channel. It detects changes in the relative position of a conductive machine target and passes the resulting signal through the associated measurement circuit.
Does the 330851-04-000-040-10-01-00 operate as a standalone monitoring device?
No. The probe is one part of a complete proximity measurement channel. It normally works with the appropriate extension cable and Proximitor Sensor, with the conditioned signal then being supplied to the machinery monitoring or protection system.
What should be checked when replacing this proximity probe?
The probe model, associated extension cable, Proximitor Sensor, mechanical mounting arrangement, and existing monitoring architecture should be checked before replacement. The installation position relative to the monitored shaft is also critical to proper measurement.
What can cause abnormal readings from a proximity probe channel?
Possible causes include incorrect probe positioning, mechanical movement of the mounting arrangement, damaged connectors or cabling, contamination or physical damage at the sensing end, or problems elsewhere in the Proximitor Sensor and monitoring circuit. Troubleshooting should therefore cover the complete measurement channel rather than the probe alone.