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- Bently Nevada
- 21000-28-05-00-056-04-02
- Proximity Probe Housing Assembly
- USA
- 83.3 mm
- 1.1 kg
- Xiamen, China
- New & In Stock
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- 1 Year
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Product Overview
The Bently Nevada 21000-28-05-00-056-04-02 Proximity Probe Housing Assembly is a mechanical housing component used with proximity probe installations on rotating machinery. It provides a defined mechanical arrangement for positioning and protecting the associated proximity sensing equipment in demanding industrial environments.
Proximity measurement systems require the sensor to maintain a controlled relationship with the monitored shaft or target. The housing assembly helps establish the mechanical reference needed for the probe installation while also supporting the physical protection of the sensing arrangement.
The 21000-28-05-00-056-04-02 is suited to machinery monitoring applications where shaft vibration, relative position, or other displacement measurements are collected through proximity probes. It can form part of a complete measurement channel that includes the probe, driver, monitoring module, and machinery protection system.
In large turbines, compressors, pumps, motors, and other rotating equipment, mechanical installation quality has a direct effect on measurement consistency. A properly installed housing helps maintain the intended probe position and reduces the risk of unwanted movement caused by machine vibration or maintenance activity.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 21000-28-05-00-056-04-02 |
| Product Type | Proximity Probe Housing Assembly |
| Application | Proximity probe installation for rotating machinery monitoring |
| Function | Mechanical mounting and housing for proximity probe measurement arrangements |
| Housing Body Diameter | 83.3 mm |
| Weight | 1.1 kg |
Product Features
- Mechanical housing assembly for proximity probe installations.
- Provides a defined mounting arrangement for associated proximity sensing equipment.
- Supports consistent probe positioning relative to the monitored machine target.
- Suitable for rotating machinery condition monitoring applications.
- Helps protect the probe installation from mechanical and environmental influences.
- Applicable to machinery vibration and shaft position measurement arrangements.
- Can be integrated into broader Bently Nevada machinery monitoring systems.
Working Principle
The 21000-28-05-00-056-04-02 does not perform the displacement measurement itself. Its primary function is mechanical: it provides the housing and mounting arrangement required for the associated proximity probe.
A proximity probe measures the changing distance between its sensing tip and a rotating shaft or conductive target. For this measurement to remain meaningful, the probe must maintain a stable mechanical reference. If the housing or mounting arrangement moves independently of the machine reference, the monitoring system may detect movement that does not originate from the shaft.
The housing assembly therefore forms part of the mechanical measurement chain:
Machine Structure → Probe Housing Assembly → Proximity Probe → Driver / Signal Conditioning → Machinery Monitoring System
During operation, the housing maintains the probe installation in its intended position while the actual sensing element detects shaft movement. This separation between the mechanical mounting function and the electronic sensing function is important when troubleshooting proximity measurement channels.
Role in a Machinery Monitoring Control Architecture
The 21000-28-05-00-056-04-02 belongs to the mechanical field-installation layer of a proximity monitoring architecture. It supports the physical positioning of the probe before the signal reaches the electronic monitoring system.
Machine Structure → Housing Assembly → Proximity Probe → Proximity Driver → Monitoring Module → Machinery Protection System
| System Element | Function |
|---|---|
| Machine Structure | Provides the fixed mechanical reference for the measurement |
| 21000-28-05-00-056-04-02 | Houses and supports the associated proximity probe |
| Proximity Probe | Detects changes in distance between the probe and rotating target |
| Proximity Driver | Interfaces with the probe and conditions the measurement signal |
| Monitoring Module | Processes vibration or position information |
| Machinery Protection System | Generates monitoring, alarm, and protection functions |
| Operator Interface | Displays measurements and machine condition information |
Because the housing is part of the mechanical reference, its installation condition should be considered when investigating unexplained proximity signal changes. A sensor may be electrically functional while the overall measurement is still affected by mechanical looseness or incorrect positioning.
Industrial Applications
| Application | Use of the 21000-28-05-00-056-04-02 |
|---|---|
| Steam Turbines | Supporting proximity probe installation for shaft monitoring |
| Gas Turbines | Providing a stable mechanical arrangement for displacement sensing |
| Compressors | Supporting shaft vibration and position measurement |
| Pumps | Housing proximity sensors used for rotating equipment monitoring |
| Motors and Generators | Supporting non-contact shaft measurement arrangements |
| Industrial Gear Machinery | Providing mechanical support for proximity-based condition monitoring |
| Machinery Protection Systems | Forming part of the physical installation of proximity measurement channels |
Installation and Maintenance
- Verify the installation location
Confirm that the housing is installed at the measurement point specified by the machinery monitoring design. - Check the mounting interface
Inspect the mechanical interface before installation. Surfaces should be clean, undamaged, and capable of maintaining the required reference position. - Confirm probe compatibility
Make sure the proximity probe and associated mounting arrangement are appropriate for the housing assembly before installation. - Maintain the correct probe position
The housing should position the probe according to the required measurement geometry. Avoid arbitrary changes to the established installation position. - Secure the housing mechanically
Check mounting hardware and ensure that the assembly cannot shift because of machine vibration or thermal cycling. - Check clearance around the assembly
Make sure surrounding components do not interfere with the housing, probe, or associated cable during machine operation. - Protect associated cabling
Route probe cables away from moving components, excessive heat, sharp edges, and areas subject to repeated mechanical stress. - Inspect for mechanical looseness
During maintenance inspections, check the housing for looseness, cracks, deformation, corrosion, or other signs of mechanical deterioration. - Verify probe gap after maintenance
If the housing or nearby machinery has been disturbed, verify the probe position and measurement gap before restarting the machine. - Check for external vibration influences
Excessive structural vibration can affect the mechanical reference. Investigate abnormal readings together with the condition of the housing and mounting structure. - Avoid unnecessary disassembly
Do not remove the housing or disturb the probe position unless required for inspection, replacement, or planned maintenance. - Perform system-level verification
After installation or replacement, verify the complete measurement chain from the housing and probe through the driver and monitoring system before placing the machine back into normal service.
Compatible System Components
| Component Type | Typical Role |
|---|---|
| Bently Nevada Proximity Probe | Detects shaft displacement or vibration relative to the probe |
| Proximity Probe Driver | Provides the electrical interface and signal conditioning |
| Machinery Monitoring Module | Processes proximity measurement signals |
| Vibration Monitoring System | Monitors shaft vibration and machine condition |
| Shaft Position Monitoring Channel | Processes relative shaft position information |
| Machinery Protection System | Provides alarm and protective functions |
| Probe Cable / Extension Cable | Connects the field probe to associated monitoring electronics |
Recommended Related Models
| Model | Product Type | Typical Application |
|---|---|---|
| Bently Nevada 3300 XL 8 mm Proximity Probe | Proximity Probe | Shaft vibration and position monitoring |
| Bently Nevada 3300 XL Proximity Transducer System | Proximity Measurement System | Non-contact shaft displacement measurement |
| Bently Nevada 3300 Series | Machinery Monitoring System | Continuous machinery monitoring and protection |
| Bently Nevada 3500 Series | Machinery Monitoring System | Machinery condition monitoring and protection |
| Bently Nevada 21000 Series | Probe Housing / Mounting Components | Mechanical installation of proximity measurement equipment |
Key Advantages
- Provides mechanical support for proximity probe installations.
- Helps maintain a stable probe reference during machine operation.
- Suitable for rotating machinery condition monitoring systems.
- Supports shaft vibration and relative position measurement arrangements.
- Can be integrated with Bently Nevada proximity measurement hardware.
- Useful for installations where mechanical probe positioning is critical to measurement quality.
Technical FAQs
What is the function of the Bently Nevada 21000-28-05-00-056-04-02?
It is a proximity probe housing assembly that provides the mechanical mounting and positioning arrangement for an associated proximity probe used in rotating machinery monitoring.
Does the 21000-28-05-00-056-04-02 measure shaft vibration directly?
No. The housing assembly itself is a mechanical component. The associated proximity probe performs the actual non-contact displacement sensing, while the driver and monitoring electronics process the resulting signal.
Why is the housing important in a proximity measurement system?
The housing helps maintain a stable mechanical reference for the probe. Unwanted movement of the housing can introduce measurement errors because the monitoring system may interpret housing movement as changes in the probe-to-shaft relationship.
What should be checked when replacing or reinstalling the housing assembly?
Check the mounting surface, mechanical fastening, probe position, measurement geometry, cable routing, and probe gap. After installation, verify the complete proximity measurement channel through the associated monitoring electronics.