Advanced Housing Assembly for Reliable Rotating Equipment Protection
The Bently Nevada 21000-28-05-20-044-04-02 Proximity Probe Housing Assembly (3300 XL) is designed to provide dependable protection and stable installation for 3300 XL 8 mm reverse-mount proximity probes in critical machinery monitoring systems. Engineered for continuous industrial service, this housing assembly helps preserve measurement accuracy by protecting the probe from vibration, moisture, contaminants, and mechanical impact while maintaining precise alignment during operation.
This configuration includes a 2.0-inch (51 mm) standoff adapter, 4.4-inch probe penetration, 0.5 m (20 in) integral probe cable, one 3/4-14 NPT plug, and a 3/4-14 NPT mounting thread. The rugged aluminum housing combined with a 304 stainless-steel probe sleeve delivers excellent corrosion resistance and long-term durability, making it an outstanding choice for predictive maintenance programs and machinery protection applications.
Technical Specifications
| Parameter | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 21000-28-05-20-044-04-02 |
| 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 | 4.4 in |
| Housing Material | Aluminum Body with 304 Stainless Steel Probe Sleeve |
| Fittings | One 3/4-14 NPT Plug |
| Mounting Thread | 3/4-14 NPT |
| Installation | External Mounting for Rotating Machinery |
| Dimensions | Approx. 270 × 78 × 78 mm |
| Weight | Approx. 2.00 kg |
Typical Applications
The 21000-28-05-20-044-04-02 is ideal for protecting proximity probe installations in demanding industrial environments.
- Steam Turbines
- Gas Turbine Packages
- Centrifugal Compressors
- High-Speed Pumps
- Industrial Electric Motors
- Power Generators
- Fans and Blowers
- Petrochemical Plants
- Oil & Gas Processing Facilities
- Power Generation Stations
Technical FAQs
1. What is the primary function of the 21000-28-05-20-044-04-02?
It provides a secure external housing that protects and accurately positions a proximity probe for continuous shaft vibration and displacement monitoring.
2. Which proximity probe is compatible with this housing?
This assembly 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-inch standoff adapter?
The integrated standoff adapter creates additional mounting clearance, making installation easier on machinery with limited access around bearing housings.
4. What does the 4.4-inch probe penetration represent?
It specifies the insertion depth of the probe sleeve, allowing accurate positioning in equipment requiring a deeper probe installation.
5. Which mounting thread is used?
The housing assembly utilizes a 3/4-14 NPT mounting thread for secure attachment to compatible machinery.
6. What materials are used in the construction?
The assembly features an aluminum housing with a 304 stainless-steel probe sleeve, combining lightweight construction with outstanding durability and corrosion resistance.
7. Can this housing operate in harsh industrial environments?
Yes. It is engineered for continuous service in environments exposed to vibration, dust, humidity, oil, and demanding operating conditions.
8. Which industries commonly install this product?
It is widely used in power generation, oil & gas, petrochemical, mining, marine, pulp and paper, and other industries that rely on critical rotating machinery.
9. What are the dimensions and weight?
The housing assembly measures approximately 270 × 78 × 78 mm and weighs approximately 2.00 kg, providing a rugged yet practical installation solution.
10. Why select the 21000-28-05-20-044-04-02?
Its durable construction, optimized probe penetration, integrated standoff adapter, and compatibility with the trusted 3300 XL monitoring platform make it a dependable choice for improving machinery reliability and supporting predictive maintenance strategies.
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