Reliable Protection for Critical Machinery Condition Monitoring
The Bently Nevada 21000-28-05-20-051-04-02 Proximity Probe Housing Assembly (3300 XL) is engineered to provide dependable mechanical protection and secure mounting for 3300 XL 8 mm reverse-mount proximity probes used in industrial machinery protection systems. Designed for continuous operation in harsh environments, this housing assembly safeguards sensitive probe components from contamination, vibration, moisture, and physical damage while maintaining precise probe positioning for accurate shaft vibration and displacement measurements.
This configuration features a 2.0-inch (51 mm) standoff adapter, a 5.1-inch probe penetration, a 0.5 m (20 in) integral probe cable, and a 3/4-14 NPT mounting thread. Manufactured with a lightweight aluminum housing and a corrosion-resistant 304 stainless-steel sleeve, it delivers exceptional durability, easy maintenance, and long-term reliability for rotating equipment across power generation, oil & gas, petrochemical, and heavy industrial facilities.
Technical Specifications
| Parameter | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 21000-28-05-20-051-04-02 |
| Product Type | Proximity Probe Housing Assembly (3300 XL) |
| Compatible Probe | 3300 XL 8 mm Reverse-Mount Proximity Probe |
| Probe Cable Length | 0.5 m (20 in) |
| Standoff Adapter | 2.0 in (51 mm) |
| Probe Penetration | 5.1 in |
| Housing Material | Aluminum Housing with 304 Stainless Steel Sleeve |
| Fitting Option | One 3/4-14 NPT Plug |
| Mounting Thread | 3/4-14 NPT |
| Installation | External Mounting for Rotating Machinery |
| Dimensions | Approx. 288 × 78 × 78 mm |
| Weight | Approx. 2.00 kg |
Recommended Applications
The 21000-28-05-20-051-04-02 is ideally suited for protecting proximity probe installations in mission-critical rotating equipment.
- Steam Turbines
- Gas Turbines
- Centrifugal Compressors
- High-Speed Pumps
- Industrial Electric Motors
- Power Generators
- Process Fans and Blowers
- Petrochemical Facilities
- Oil & Gas Processing Plants
- Power Generation Stations
Technical FAQs
1. What is the purpose of the 21000-28-05-20-051-04-02 housing assembly?
It provides secure mounting and environmental protection for a 3300 XL proximity probe, ensuring stable and accurate shaft vibration monitoring.
2. Which proximity probe is compatible with this assembly?
This model is configured for a 3300 XL 8 mm reverse-mount proximity probe with a 0.5 m (20 in) integral cable.
3. What is the purpose of the 2.0-inch standoff adapter?
The integrated standoff adapter provides additional clearance between the machine casing and the housing, making installation easier in applications with restricted mounting space.
4. What does the 5.1-inch probe penetration indicate?
The probe penetration specifies the insertion depth of the probe sleeve, making this configuration suitable for machinery requiring deeper probe positioning.
5. Which mounting thread is provided?
The housing assembly is equipped with a 3/4-14 NPT mounting thread for secure installation on compatible machinery.
6. What materials are used in the housing?
The assembly combines an aluminum housing with a 304 stainless-steel probe sleeve, providing excellent durability and corrosion resistance.
7. Is this housing suitable for harsh industrial environments?
Yes. It is designed for continuous service in environments exposed to vibration, humidity, oil, dust, and demanding process conditions.
8. Which industries commonly use this housing assembly?
It is widely installed in oil & gas, petrochemical, power generation, mining, marine, pulp & paper, and other industries operating critical rotating machinery.
9. What are the dimensions and weight?
The housing assembly measures approximately 288 × 78 × 78 mm and weighs approximately 2.00 kg, providing a robust solution for industrial machinery monitoring.
10. Why choose the 21000-28-05-20-051-04-02?
Its heavy-duty construction, optimized probe penetration, integrated standoff adapter, and compatibility with the trusted 3300 XL platform make it an excellent choice for maximizing equipment uptime and supporting predictive maintenance strategies.
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