Rugged Housing Assembly for Accurate Rotating Equipment Monitoring
The Bently Nevada 21000-28-05-20-038-04-02 Proximity Probe Housing Assembly (3300 XL) is engineered to provide dependable protection and precise mounting for 3300 XL 8 mm reverse-mount proximity probes used in machinery protection systems. Designed for continuous operation in demanding industrial environments, this housing assembly safeguards the probe against contamination, vibration, and mechanical damage while maintaining optimal probe alignment for highly accurate shaft vibration and displacement measurements.
This configuration incorporates a 2.0-inch standoff adapter, a 3.8-inch probe penetration, a 0.5 m (20 in) integral probe cable, and a 3/4-14 NPT mounting thread. Its durable aluminum housing combined with a 304 stainless-steel probe sleeve delivers outstanding corrosion resistance and long service life, making it an ideal solution for predictive maintenance and critical asset protection across numerous industrial sectors.
Technical Specifications
| Parameter | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 21000-28-05-20-038-04-02 |
| 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 | 3.8 in |
| Housing Material | Aluminum Body with 304 Stainless Steel Probe Sleeve |
| Fitting Option | One 3/4-14 NPT Plug |
| Mounting Thread | 3/4-14 NPT |
| Installation | External Mounting for Rotating Machinery |
| Dimensions | Approx. 252 × 78 × 78 mm |
| Weight | Approx. 2.00 kg |
Where It Performs Best
The 21000-28-05-20-038-04-02 is widely deployed in industrial applications that require dependable machinery condition monitoring.
- Steam Turbines
- Gas Turbines
- Centrifugal Compressors
- High-Speed Pumps
- Electric Motors
- Power Generators
- Industrial Fans and Blowers
- Petrochemical Processing Plants
- Oil & Gas Production Facilities
- Power Generation Stations
Technical FAQs
1. What is the purpose of the 21000-28-05-20-038-04-02 housing assembly?
It securely mounts and protects a 3300 XL proximity probe while maintaining stable positioning for accurate shaft vibration and displacement monitoring.
2. Which probe is compatible with this assembly?
The housing 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 function of the 2-inch standoff adapter?
The standoff adapter creates additional clearance between the machine casing and the housing, making installation easier in restricted mounting locations.
4. What does the 3.8-inch probe penetration indicate?
It specifies the effective insertion depth of the probe sleeve, allowing accurate positioning within medium-depth bearing housings.
5. Which mounting thread does this model use?
The assembly features a 3/4-14 NPT threaded connection for secure installation on compatible machinery.
6. What materials are used in the housing?
The housing consists of a lightweight aluminum body combined with a durable 304 stainless-steel probe sleeve, providing excellent strength and corrosion resistance.
7. Is this housing suitable for continuous industrial operation?
Yes. It is engineered for long-term service in environments exposed to vibration, dust, oil, humidity, and temperature fluctuations.
8. Which industries commonly use this product?
It is widely installed in power generation, oil & gas, petrochemical, mining, marine, pulp and paper, and other industries operating critical rotating equipment.
9. What are the dimensions and weight?
The housing assembly measures approximately 252 × 78 × 78 mm and weighs approximately 2.00 kg, making it suitable for a broad range of machinery protection applications.
10. Why choose the 21000-28-05-20-038-04-02?
Its rugged construction, optimized probe penetration, integrated standoff adapter, and compatibility with the trusted 3300 XL monitoring platform make it an excellent solution for improving equipment reliability and supporting predictive maintenance programs.
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