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- Bently Nevada
- 3120-2800-300
- Proximitor
- USA
- 100 × 35 × 80 mm
- 0.14 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Bently Nevada 3120-2800-300 Proximitor is a signal-conditioning component used in proximity transducer measurement systems for rotating machinery. A Proximitor receives the electrical response from a compatible proximity probe and processes it into a signal that can be used by machinery monitoring equipment.
In industrial applications, proximity transducers are commonly installed to monitor shaft vibration and relative shaft position. The probe senses changes in the gap between its tip and a conductive target, while the Proximitor provides the excitation and signal-processing functions required by the measurement circuit.
This distinction is important when troubleshooting a machinery monitoring channel. An abnormal reading may originate from the probe, the connecting cable, the Proximitor, or the monitoring equipment. Understanding the function of each component helps maintenance personnel isolate the fault without unnecessarily replacing other parts of the measurement system.
For example, a compressor monitoring installation may use proximity probes near the shaft bearings to measure relative shaft movement. The probe signal passes through the associated transducer circuit, and the Proximitor converts the response into a usable output for the monitoring channel. The monitoring equipment then evaluates the measurement according to its configured functions.
Proximitor components are used in machinery monitoring arrangements across compressors, turbines, pumps, and other rotating equipment. Their suitability depends on the electrical characteristics of the connected probe and cable, as well as the requirements of the monitoring system.
The 3120-2800-300 is identified by its specific model reference. Its role should be distinguished from that of a proximity probe, which performs the actual non-contact sensing, and a monitoring module, which evaluates the processed signal. The three components serve different functions within the complete measurement channel.
For maintenance work, correct identification of the installed Proximitor is essential. Replacing it with a unit from another transducer family without establishing electrical compatibility may affect measurement sensitivity, output behavior, or the accuracy of the resulting readings.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 3120-2800-300 |
| Product Type | Proximitor |
| Product Function | Proximity transducer signal conditioning |
| Measurement System | Proximity probe transducer system |
| Primary Role | Processing the electrical response from a compatible proximity probe |
| Typical Application | Rotating machinery displacement and vibration monitoring |
| Dimensions | 100 × 35 × 80 mm |
| Weight | 0.14 kg |
Product Features
- Proximity signal conditioning: Processes the electrical response received from a compatible proximity probe.
- Transducer system integration: Serves as an intermediate component between the probe circuit and monitoring equipment.
- Machinery monitoring support: Supports measurement channels used for shaft displacement and vibration monitoring.
- Model-specific replacement: Provides an identifiable component reference for maintenance of an existing installation.
- Measurement channel troubleshooting: Can be evaluated as part of fault isolation when a proximity measurement becomes abnormal.
- Rotating equipment applications: Relevant to compatible monitoring installations on industrial compressors, turbines, and pumps.
Working Principle
A Proximitor works with a compatible proximity probe and its associated cable to form an electrical measurement circuit. The probe produces an electrical response that varies with the distance between its sensing tip and a conductive target. The Proximitor processes this response into an output that can be interpreted by the connected monitoring equipment.
Conductive Shaft → Proximity Probe → Compatible Cable → Proximitor → Monitoring Equipment
When the probe is positioned near the shaft, its electromagnetic field interacts with the conductive target. Changes in the probe-to-target gap alter the electrical characteristics of the transducer circuit. The Proximitor processes this response, allowing the connected monitoring equipment to obtain a displacement-related measurement.
In a shaft vibration application, the probe detects changes in the relative position of the shaft and the stationary measurement point. The Proximitor supplies the corresponding conditioned signal to the monitoring channel, which can then evaluate the measurement according to its configured functions.
The Proximitor does not replace the probe’s sensing function or the monitoring module’s analysis functions. It forms the signal-conditioning stage between them. The accuracy of the complete measurement depends on the compatibility and condition of the probe, cable, Proximitor, and connected monitoring equipment.
If the output is abnormal, technicians should assess the complete circuit rather than assume the Proximitor is defective. Probe gap, cable integrity, supply conditions, connector contact, and the receiving monitoring channel can all affect the observed measurement.
Role in the Machinery Monitoring Architecture
The Bently Nevada 3120-2800-300 occupies the signal-conditioning stage of a proximity measurement channel. It processes the probe response so the monitoring equipment can evaluate shaft movement and other supported displacement-related measurements.
Machine Shaft → Proximity Probe → Transducer Cable → 3120-2800-300 Proximitor → Monitoring Module
| System Component | Function |
|---|---|
| Bently Nevada 3120-2800-300 | Processes the electrical response from a compatible proximity probe |
| Proximity Probe | Detects changes in the gap between the sensing tip and conductive target |
| Transducer Cable | Connects the probe to the Proximitor as part of the measurement circuit |
| Monitoring Module | Receives and evaluates the conditioned signal |
| Bearing Assembly | Supports the shaft and provides the stationary measurement reference |
| Rotating Shaft | Provides the conductive target for proximity sensing |
| Monitoring Software | Displays measurement values and supports trend analysis |
| Machinery Protection System | Applies configured alarm and protective functions through the monitoring architecture |
Industrial Applications
| Application | Typical Use |
|---|---|
| Centrifugal Compressors | Conditioning proximity signals used for shaft monitoring |
| Steam Turbines | Supporting compatible shaft displacement measurement channels |
| Gas Turbines | Processing probe signals for rotating machinery monitoring |
| Industrial Pumps | Supporting proximity measurement of relative shaft movement |
| Power Generation Equipment | Providing the signal-conditioning stage for compatible transducer systems |
| Petrochemical Facilities | Maintaining proximity measurement channels on critical rotating equipment |
| Refinery Machinery | Supporting maintenance of shaft monitoring instrumentation |
| Process Compressors | Processing signals from compatible shaft proximity probes |
| Machinery Maintenance Programs | Replacing a faulty signal-conditioning component in an established system |
| Industrial Monitoring Installations | Supporting non-contact displacement measurement through compatible transducer circuits |
Installation and Maintenance
- Verify the model reference: Confirm that the replacement component is identified as Bently Nevada 3120-2800-300.
- Prepare the equipment safely: Follow the site’s electrical isolation and machinery maintenance procedures before disconnecting the monitoring circuit.
- Document the existing connections: Record the probe, cable, power, and output connections before removing the installed component.
- Inspect the mounting location: Check the mounting surface and retaining hardware for damage or contamination.
- Check the probe circuit: Inspect the connected probe and cable for visible damage, loose connections, or deteriorated insulation.
- Confirm electrical compatibility: Establish that the replacement Proximitor matches the connected probe and transducer system requirements.
- Install the component: Secure the Proximitor in the designated mounting position without placing strain on its terminals or cable connections.
- Reconnect the wiring: Restore the electrical connections according to the applicable wiring arrangement.
- Inspect terminal contact: Ensure that connections are secure and that no conductor strands or debris can cause unintended contact.
- Restore the supply: Re-energize the circuit in accordance with the approved commissioning procedure.
- Verify the output signal: Check that the monitoring equipment receives a plausible measurement and that no new channel fault is indicated.
- Record the maintenance results: Document the replacement model, connection checks, signal observations, and final operating status.
Related Components
| Component | Function |
|---|---|
| Bently Nevada 3120-2800-300 | Proximitor component for a compatible proximity measurement system |
| Compatible Proximity Probe | Detects changes in the gap between the probe tip and conductive target |
| Compatible Transducer Cable | Carries the probe response to the signal-conditioning component |
| Monitoring Module | Receives and evaluates the conditioned measurement signal |
| Probe Mounting Hardware | Maintains the probe’s position relative to the monitored shaft |
| Bearing Assembly | Supports the shaft and provides the stationary reference for relative measurements |
| Machinery Monitoring Software | Supports measurement display and trend review |
| Machinery Protection System | Applies configured alarms and protective actions |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Bently Nevada 3120-2800-300 | Proximitor | Model-specific replacement in a compatible installation |
| Bently Nevada 3300 XL Proximitor Sensor | Signal-Conditioning Sensor | Processing signals from compatible 3300 XL proximity transducers |
| Bently Nevada 7200 Series Proximitor Sensor | Signal-Conditioning Sensor | Signal conditioning for compatible 7200 Series transducer systems |
| Bently Nevada 3300 XL Proximity Probe | Proximity Probe | Non-contact shaft displacement measurement in a compatible system |
| Bently Nevada 3500 Series | Machinery Protection System | Monitoring supported vibration and shaft-position measurements |
Key Advantages
- Performs the signal-conditioning function in a compatible proximity measurement circuit.
- Supports shaft displacement and vibration monitoring through associated instrumentation.
- Provides a model-specific reference for maintenance and replacement work.
- Helps technicians isolate faults within the complete proximity transducer channel.
- Integrates into suitable rotating machinery monitoring arrangements.
Technical FAQs
What is the difference between a Proximitor and a proximity probe?
The proximity probe senses changes in the distance between its tip and a conductive target. The Proximitor processes the probe’s electrical response into a signal for the monitoring equipment. They perform separate functions within the same transducer system.
Can the 3120-2800-300 be substituted for a newer Proximitor Sensor?
A replacement must match the original transducer system’s electrical requirements and measurement characteristics. Newer Proximitor Sensors may belong to different product families, so model similarity alone does not establish interchangeability.
What could cause an abnormal output from the Proximitor?
Possible causes include an incompatible or damaged probe, a faulty cable, poor electrical connections, unsuitable supply conditions, or a problem in the receiving monitoring channel. The complete measurement circuit should be assessed before identifying the Proximitor as the source of the fault.
Why is compatibility with the connected probe important?
The probe, cable, and Proximitor operate together as an electrical measurement system. Differences in their characteristics can change the output response and affect measurement accuracy, even if the components can be physically connected.