Tutto sui PLC: la CPU
A practical engineering guide to PLC CPU operation, from deterministic scan cycles and I/O image tables to memory, communications, diagnostics, redundancy, processor sizing, and reliable system...
Safe and reliable containment of proximity transducers is achieved using the 21000-28-05-00-073-04-02 housing assembly, engineered by Bently Nevada for hazardous and demanding industrial environments. This system acts as a protective conduit and enclosure, enabling the installation of proximity probes directly through machinery casings while maintaining seal integrity and environmental shielding.
This specific configuration integrates a 3300 XL 8 mm proximity probe featuring multiple international hazardous area approvals. With an overall probe penetration depth of 7.3 inches, the assembly installs directly into machine housings via 3/4-14 NPT threads. The external mechanical layout is constructed with a rugged aluminum body paired with a durable 304 stainless steel sleeve to deliver superior defense against corrosive and high-vibration operating conditions.
Note: This component configuration has a direct transition path to updated equivalents, such as the 21000-16-05-00-073-04-02 housing assembly. It remains a key maintenance and replacement part for existing plant instrumentation layouts.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Bently Nevada |
| Model/Part Number | 21000-28-05-00-073-04-02 |
| Housing Series | 21000 (Explosion-proof / Flameproof) |
| Probe Option | 3300 XL 8 mm probe with multiple approvals (Option 28) |
| Probe Cable Length | 0.5 meter (20 inches) (Option 05) |
| Standoff Adapter Option | No standoff adapter (Option 00) |
| Probe Penetration Depth | 7.3 inches (Option 073) |
| Fittings Option | One 3/4-14 NPT plug only (Option 04) |
| Mounting Thread | 3/4-14 NPT (Option 02) |
| Material | Aluminum body with 304 Stainless Steel sleeve |
| Shipping Weight | 2.0 kg |
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Returns & Warranty

Safe and reliable containment of proximity transducers is achieved using the 21000-28-05-00-073-04-02 housing assembly, engineered by Bently Nevada for hazardous and demanding industrial environments. This system acts as a protective conduit and enclosure, enabling the installation of proximity probes directly through machinery casings while maintaining seal integrity and environmental shielding.
This specific configuration integrates a 3300 XL 8 mm proximity probe featuring multiple international hazardous area approvals. With an overall probe penetration depth of 7.3 inches, the assembly installs directly into machine housings via 3/4-14 NPT threads. The external mechanical layout is constructed with a rugged aluminum body paired with a durable 304 stainless steel sleeve to deliver superior defense against corrosive and high-vibration operating conditions.
Note: This component configuration has a direct transition path to updated equivalents, such as the 21000-16-05-00-073-04-02 housing assembly. It remains a key maintenance and replacement part for existing plant instrumentation layouts.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Bently Nevada |
| Model/Part Number | 21000-28-05-00-073-04-02 |
| Housing Series | 21000 (Explosion-proof / Flameproof) |
| Probe Option | 3300 XL 8 mm probe with multiple approvals (Option 28) |
| Probe Cable Length | 0.5 meter (20 inches) (Option 05) |
| Standoff Adapter Option | No standoff adapter (Option 00) |
| Probe Penetration Depth | 7.3 inches (Option 073) |
| Fittings Option | One 3/4-14 NPT plug only (Option 04) |
| Mounting Thread | 3/4-14 NPT (Option 02) |
| Material | Aluminum body with 304 Stainless Steel sleeve |
| Shipping Weight | 2.0 kg |
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|