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- Bently Nevada
- 330904-01-14-05-02-00
- 3300 NSv Proximity Probe
- USA
- 0.5 meters
- 0.15 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Bently Nevada 330904-01-14-05-02-00 is a 3300 NSv Proximity Probe used for non-contact measurement of shaft position and vibration in rotating machinery monitoring systems.
The probe is installed close to a rotating shaft or other conductive target. As the target moves relative to the probe tip, the probe system detects the change in the gap between the probe and target. The resulting measurement is processed by the associated proximity system and used to monitor machine condition.
A proximity probe is particularly useful for machinery where direct contact with the rotating shaft is not practical. Typical measurements include radial shaft vibration and shaft position on rotating equipment such as turbines, compressors, pumps, and other high-speed machines.
The 3300 NSv family is associated with compact probe applications where installation space around the machine is limited. The probe works as part of a complete proximity measurement chain rather than as an independent monitoring instrument, so compatibility with the corresponding extension cable and Proximitor Sensor should be checked when selecting a replacement.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 330904-01-14-05-02-00 |
| Product Family | 3300 NSv |
| Product Type | Proximity Probe |
| Measurement Principle | Eddy-current proximity measurement |
| Application | Shaft vibration and position monitoring |
| Total Length | 0.5 meters |
| Weight | 0.15 kg |
Product Features
- Bently Nevada 3300 NSv proximity probe
- Non-contact measurement of rotating shaft movement
- Suitable for vibration and shaft-position monitoring
- Eddy-current sensing principle
- Intended for use with a compatible Proximitor Sensor and extension cable
- Suitable for rotating machinery condition-monitoring systems
- Useful where direct-contact measurement is impractical
- Compact probe format for machinery monitoring installations
- Applicable to turbines, compressors, pumps, and other rotating equipment
Working Principle
The 330904-01-14-05-02-00 operates as part of an eddy-current proximity measurement system.
Rotating Shaft → 330904 NSv Probe → Extension Cable → Proximitor Sensor → Monitoring System
The probe is positioned near a conductive shaft target without making physical contact. The Proximitor Sensor supplies the probe system with the required high-frequency electrical signal and detects changes in the probe’s electrical characteristics as the shaft-to-probe gap changes.
When the shaft moves radially because of vibration, the gap between the shaft surface and probe tip changes. The resulting electrical variation is converted by the Proximitor Sensor into a measurement that represents shaft movement.
The same principle can be used to monitor shaft position. In thrust or axial-position applications, movement along the shaft axis changes the probe gap and produces a corresponding measurement.
The monitoring system can use these signals for vibration trending, alarm generation, shutdown protection, and machinery diagnostics. Correct probe installation and gap setting are therefore important because an incorrect mechanical position can affect the measurement range and signal quality.
Role in a Bently Nevada 3300 Machinery Monitoring Architecture
The 330904-01-14-05-02-00 is the sensing element at the machine level of the proximity monitoring chain.
Rotating Shaft → Proximity Probe → Extension Cable → Proximitor Sensor → 3300 Monitoring System → Alarm / Protection / Plant System
| System Element | Function |
|---|---|
| Rotating Shaft | Provides the conductive target being monitored |
| 330904-01-14-05-02-00 | Detects changes in shaft-to-probe distance |
| Extension Cable | Connects the probe with the Proximitor Sensor |
| Proximitor Sensor | Powers the probe circuit and converts gap changes into an electrical output |
| 3300 Monitoring System | Processes and monitors vibration or position signals |
| Relay / Protection Logic | Generates alarms or shutdown actions when configured limits are exceeded |
| Plant Control System | Receives machinery condition information for monitoring and operational decisions |
The probe itself does not calculate vibration severity or generate machine protection decisions. Those functions are handled by the associated signal-conditioning and monitoring equipment.
Industrial Applications
| Application | Typical Use |
|---|---|
| Steam Turbines | Monitoring shaft vibration and position |
| Gas Turbines | Measuring rotating shaft movement |
| Centrifugal Compressors | Monitoring rotor vibration and shaft position |
| Pumps | Detecting radial shaft movement and mechanical condition |
| Expanders | Monitoring high-speed rotating components |
| Generators | Monitoring shaft behavior in critical rotating equipment |
| Industrial Motors | Measuring shaft vibration where proximity monitoring is required |
| Turbo Machinery | Supporting continuous machinery condition monitoring |
| Process Plants | Providing shaft measurements for predictive maintenance and protection systems |
Installation and Maintenance
- Confirm that the 330904-01-14-05-02-00 is the correct probe for the existing 3300 NSv proximity measurement system.
- Verify compatibility with the associated Proximitor Sensor and extension cable before installation.
- Inspect the probe tip for mechanical damage, contamination, or signs of impact before installation.
- Mount the probe securely using the specified mechanical arrangement and maintain the required clearance from the rotating target.
- Set the probe gap according to the applicable Bently Nevada installation procedure and system requirements.
- Ensure that the probe does not contact the rotating shaft during normal machine operation.
- Route the probe cable away from high-current power wiring and sources of excessive electrical interference where practical.
- Secure the cable to prevent vibration, rubbing, or excessive mechanical stress at the probe connection.
- After installation, verify the probe bias or operating condition through the associated Proximitor Sensor and monitoring system.
- Compare the measured shaft signal with expected machine behavior during commissioning and startup.
- If the signal is unstable or outside the expected range, check probe installation, gap, cable connections, Proximitor Sensor operation, and the monitoring channel.
- During replacement, document the original probe position and installation gap so that the new probe can be installed consistently.
Compatible System Components
| Component | Function |
|---|---|
| Bently Nevada Proximitor Sensor | Supplies and conditions the proximity probe signal |
| 3300 NSv Extension Cable | Connects the probe to the Proximitor Sensor |
| Bently Nevada 3300 Monitoring System | Processes vibration and position measurements |
| Monitoring Modules | Acquire and evaluate machinery condition signals |
| Relay / Protection Modules | Provide configured alarm and shutdown functions |
| Machinery Shaft | Conductive measurement target |
| Machinery Protection System | Uses proximity measurements for equipment protection |
Recommended Related Models
| Model / Product | Product Type | Typical Application |
|---|---|---|
| Bently Nevada 330904-01-14-05-02-00 | 3300 NSv Proximity Probe | Shaft vibration and position measurement |
| Bently Nevada 3300 NSv Proximity Probes | Proximity Probe Family | Compact rotating-machinery monitoring |
| Bently Nevada 3300 XL Proximitor Sensors | Proximity Signal Conditioner | Conditioning eddy-current probe signals |
| Bently Nevada 3300 Monitoring System | Machinery Monitoring System | Vibration and position monitoring |
| Bently Nevada Extension Cables | Probe Extension Cable | Connecting proximity probes with Proximitor Sensors |
Key Advantages
- Non-contact shaft measurement.
- Suitable for rotating machinery vibration monitoring.
- Can be used for shaft-position measurement.
- Compact 3300 NSv probe format.
- Works with a dedicated Proximitor Sensor and monitoring system.
- Suitable for continuous machinery condition monitoring.
- Useful for turbines, compressors, pumps, and other critical rotating equipment.
Technical FAQs
What does the Bently Nevada 330904-01-14-05-02-00 measure?
The 3300 NSv proximity probe detects changes in the distance between the probe tip and a conductive rotating target. Depending on the installation, the resulting measurement can be used for shaft vibration or shaft-position monitoring.
Does the 330904-01-14-05-02-00 operate by itself?
No. The probe is one part of a complete proximity measurement system. It normally works with a compatible extension cable, Proximitor Sensor, and monitoring system that supplies the probe circuit and processes the resulting signal.
Why is probe gap important during installation?
The gap determines the operating point of the proximity measurement system. An incorrect gap can reduce usable measurement range or produce an abnormal signal, so the probe should be positioned according to the applicable system installation requirements.
What should be checked if the proximity signal becomes unstable?
Check the mechanical probe position and gap first, followed by the probe connection, extension cable, Proximitor Sensor, and monitoring channel. Mechanical movement of the probe mount, cable damage, or an incorrect installation gap can all affect the measured signal.