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- CA21000-28-05-00-064-04-02
- Explosion-Proof Housing Assembly
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Product Overview
The Bently Nevada CA21000-28-05-00-064-04-02 is a 21000 Series explosion-proof proximity probe housing assembly configured with a 3300 XL 8 mm proximity probe. The complete assembly combines the probe, a 0.5-meter probe cable, a housing with no standoff adapter, a specified probe penetration length, and the fittings required by the selected configuration.
This arrangement is intended for machinery installations where a proximity probe must measure shaft position or relative shaft vibration while being installed through a protective housing. On compressors, turbines, and other rotating equipment, the probe is positioned near a conductive shaft target. The housing provides the mechanical mounting and enclosure arrangement around the probe installation, while the transducer system supplies the electrical measurement signal.
The part number defines the assembly configuration rather than simply identifying an empty enclosure. The 28 option specifies a 3300 XL 8 mm probe with multiple approvals, 05 specifies a 0.5-meter probe cable, 00 means no standoff adapter, and 064 specifies 6.4 inches of probe penetration. The final codes specify the fitting and mounting-thread arrangements.
For maintenance teams, this configuration is particularly relevant when replacing an existing housing assembly without changing the established probe mounting geometry. The probe penetration, mounting thread, cable length, and enclosure fittings must match the machine installation. Selecting a housing based only on its explosion-proof designation may leave important mechanical or electrical differences unresolved.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Model | CA21000-28-05-00-064-04-02 |
| Product Family | 21000 Series |
| Product Type | Explosion-Proof Housing Assembly |
| Probe Option | 28 – 3300 XL 8 mm probe, multiple approvals |
| Probe Cable Length | 05 – 0.5 meters |
| Standoff Adapter | 00 – No standoff adapter |
| Probe Penetration | 064 – 6.4 inches |
| Fitting Option | 04 – One 3/4-14 NPT plug only |
| Mounting Thread | 02 – 3/4-14 NPT |
| Housing Material | Aluminum body with 304 stainless steel sleeve |
| Hazardous-Area Application | Explosion-proof installation under applicable CA21000 certification conditions |
| Cable Length | 0.5 meters |
| Weight | 1.1 kg |
Product Features
- Integrated 3300 XL 8 mm probe: Includes the specified proximity probe as part of the assembly configuration.
- Explosion-proof housing format: The CA21000 series supports appropriately configured hazardous-area installations.
- Defined probe penetration: The 6.4-inch penetration specification establishes the required probe reach into the machine mounting location.
- No standoff adapter: The
00option simplifies the configuration where a separate standoff adapter is not required. - 0.5-meter probe cable: Specifies the cable length included in the selected probe configuration.
- 3/4-14 NPT mounting thread: Defines the housing’s mounting interface for the applicable machine installation.
- Specified fitting arrangement: The
04option provides one 3/4-14 NPT plug. - Aluminum body and stainless-steel sleeve: Combines the housing body with a 304 stainless steel sleeve.
- Configuration-based ordering: The full part number identifies the probe, cable length, penetration, fittings, and mounting thread.
Working Principle
The CA21000 assembly holds a proximity probe in a controlled position relative to the machine shaft. Its primary role is mechanical: to house and mount the probe while maintaining the intended sensing geometry.
The 3300 XL 8 mm probe operates using eddy-current sensing. When supplied by its compatible Proximitor sensor, the probe generates an electromagnetic field at its tip. As the distance between the probe tip and the conductive shaft changes, the electrical response changes accordingly. The associated electronics convert this response into a signal for the monitoring system.
The measurement chain is:
Conductive Shaft → 3300 XL 8 mm Proximity Probe → Probe Cable and Compatible Extension Cable → Proximitor Sensor → Machinery Monitoring System
The housing’s penetration dimension determines how far the probe reaches into the installation. The mounting thread secures the housing to the designated opening, while the fitting arrangement defines the available enclosure connection. These mechanical details help maintain the probe position and protect the installation.
Correct operation depends on the complete transducer system, including the probe, extension cable, Proximitor, and monitor. The housing alone does not measure vibration or generate a monitoring signal.
Role in a Bently Nevada 3300 XL Proximity Monitoring Architecture
The CA21000-28-05-00-064-04-02 provides the housing and mounting arrangement for a 3300 XL 8 mm proximity probe. It allows the probe to be installed at the required position while supporting an appropriately configured explosion-proof installation.
| System Element | Function |
|---|---|
| CA21000 Housing Assembly | Houses and supports the probe installation |
| 3300 XL 8 mm Proximity Probe | Detects changes in the distance between the probe tip and the conductive shaft |
| 0.5-Meter Probe Cable | Connects the probe to the remainder of the transducer system |
| Compatible Extension Cable | Completes the required electrical connection to the Proximitor |
| 3300 XL Proximitor Sensor | Supplies the probe excitation and conditions the measurement signal |
| 3300 XL Monitoring Channel | Receives the conditioned signal for shaft-position or vibration measurement |
| Machine Mounting Point | Establishes the probe’s position relative to the measured shaft |
The assembly must be matched to the installed measurement channel. The probe type, extension-cable length, Proximitor configuration, mounting thread, and penetration dimension all affect whether the complete system can be installed and operated as intended.
Industrial Applications
| Application | Typical Use |
|---|---|
| Centrifugal Compressors | Housing a proximity probe used to measure relative shaft movement |
| Steam Turbines | Installing a probe for shaft-position and vibration monitoring |
| Gas Turbines | Supporting a configured proximity measurement point in rotating equipment |
| Industrial Generators | Providing the mounting arrangement for a shaft proximity probe |
| Process Pumps | Installing a proximity probe where the machine monitoring design uses shaft displacement measurement |
| Petrochemical Equipment | Supporting probe installations that require the applicable explosion-proof housing configuration |
| Rotating Machinery Protection | Maintaining an established 3300 XL proximity measurement channel |
| Legacy Monitoring-System Maintenance | Replacing a configured housing assembly while preserving the original mounting and cable arrangement |
Installation and Maintenance
- Verify the complete part number: Confirm CA21000-28-05-00-064-04-02 against the installed assembly and maintenance documentation.
- Confirm the hazardous-area requirements: Verify that the CA21000 configuration and its applicable certification conditions match the installation location.
- Check the mounting thread: Confirm that the machine opening accepts the specified 3/4-14 NPT mounting interface.
- Verify probe penetration: Check that the 6.4-inch penetration dimension matches the required probe reach and machine geometry.
- Inspect the housing body and sleeve: Look for cracks, deformation, damaged threads, corrosion, or other conditions that could affect installation.
- Check the fitting arrangement: Confirm that the single 3/4-14 NPT plug specified by option
04matches the intended housing configuration. - Inspect the included probe: Check the 3300 XL 8 mm probe tip and connector for visible damage or contamination before installation.
- Protect the probe cable: Avoid twisting, crushing, pulling, or sharply bending the 0.5-meter cable during handling.
- Verify the extension-cable combination: Match the probe cable and extension cable to the required 3300 XL transducer-system configuration.
- Set the probe gap correctly: Establish the operating gap according to the applicable probe and monitoring-system requirements.
- Verify the measurement channel: Check the Proximitor connection and monitoring-system output before returning the machine to service.
- Record the installation configuration: Document the complete housing part number, probe location, cable arrangement, mounting dimensions, and associated monitoring channel for future maintenance.
Related Components
| Component | Function |
|---|---|
| 3300 XL 8 mm Proximity Probe | Measures relative distance to a conductive shaft target |
| 3300 XL Extension Cable | Connects the probe cable to the Proximitor while maintaining the specified system configuration |
| 3300 XL Proximitor Sensor | Supplies excitation and converts the probe response into a usable electrical signal |
| 3300 XL Monitoring Channel | Receives and processes the conditioned proximity measurement |
| 3/4-14 NPT Mounting Interface | Provides the specified housing mounting connection |
| 3/4-14 NPT Plug | Closes the designated threaded port according to the fitting configuration |
Recommended Related Models
| Model / Product | Product Type | Typical Application |
|---|---|---|
| Bently Nevada CA21000-28-05-15-032-01-02 | Explosion-Proof Housing Assembly | Related configuration with a 3300 XL 8 mm probe, 0.5-meter cable, 1.5-inch standoff adapter, 3.2-inch probe penetration, and a different fitting arrangement |
| Bently Nevada 21000 Series | Proximity Probe Housing Assembly | Related housing family for configurations that do not use the CA21000 explosion-proof designation |
| Bently Nevada CA24701 Series | Explosion-Proof Proximity Probe Housing Assembly | Related housing family for applicable 24701 configurations |
| Bently Nevada 3300 XL 8 mm Proximity Probe | Proximity Probe | Replacement probe where the original assembly requires this probe type and approval configuration |
| Bently Nevada 3300 XL Proximitor Sensor | Proximity Signal Conditioner | Signal-conditioning component selected according to the probe and cable system requirements |
These related products have different mechanical configurations or system roles. They should not be treated as direct replacements without checking probe penetration, mounting thread, fittings, cable length, approvals, and the associated Proximitor configuration.
Key Advantages
- Combines a specified 3300 XL 8 mm probe with its housing and mounting arrangement.
- Defines the probe cable length, penetration, fitting, and mounting thread in one part number.
- Supports appropriately configured explosion-proof installations.
- Uses an aluminum body with a 304 stainless steel sleeve.
- Helps preserve an existing proximity measurement installation when the complete configuration matches.
Technical FAQs
What probe is included in the CA21000-28-05-00-064-04-02 assembly?
The 28 option specifies a 3300 XL 8 mm proximity probe with multiple approvals. The assembly configuration also specifies a 0.5-meter probe cable, no standoff adapter, 6.4-inch probe penetration, one 3/4-14 NPT plug, and a 3/4-14 NPT mounting thread.
What does the 064 option mean in this part number?
The 064 code specifies a probe penetration of 6.4 inches. This dimension determines the probe’s reach through the housing arrangement and must match the required installation geometry.
Does the CA21000 housing assembly include a Proximitor sensor?
The stated configuration specifies the probe and housing assembly, including the probe cable. The Proximitor sensor is a separate part of the complete proximity measurement channel and must be selected to match the probe and cable arrangement.
Why is the CA21000 version selected instead of a standard 21000 housing?
The CA21000 version is intended for appropriately configured explosion-proof installations under its applicable certification conditions. The required certification, fittings, mounting configuration, and installation location must all be considered when selecting the housing assembly.