Engineered for Extended-Reach Monitoring of Critical Rotating Equipment
The Bently Nevada 21000-28-05-20-095-04-02 3300 XL Probe Housing Assembly is a premium external mounting solution designed for 3300 XL 8 mm reverse-mount proximity probes used in continuous vibration and shaft position monitoring. Built for demanding industrial environments, this housing assembly protects the probe against moisture, dust, oil, and mechanical impact while allowing quick probe adjustment and replacement without disassembling the machine. Its robust cast aluminum construction and stainless-steel probe sleeve ensure long-term reliability for mission-critical machinery operating around the clock.
This configuration includes a 3300 XL 8 mm reverse-mount proximity probe with multiple hazardous-area approvals, a 0.5 m (20 in.) integral probe cable, a 2.0-inch (51 mm) standoff adapter, a 9.5-inch (241 mm) probe penetration, Option 04 conduit fittings, and a 3/4-14 NPT mounting thread. The extended probe penetration makes this model particularly suitable for deep bearing housings and applications requiring increased installation reach.
Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 21000-28-05-20-095-04-02 |
| Product Type | 3300 XL Probe Housing Assembly |
| Housing Series | 21000 |
| Probe Type | 3300 XL 8 mm Reverse-Mount Probe |
| Hazardous Area Approval | Multiple Approvals |
| Probe Cable Length | 0.5 m (20 in.) |
| Standoff Adapter | 2.0 in. (51 mm) |
| Probe Penetration | 9.5 in. (241 mm) |
| Fittings | Option 04 – One 3/4-14 NPT Plug |
| Mounting Thread | 3/4-14 NPT |
| Housing Material | Cast Aluminum |
| Probe Sleeve Material | 304 Stainless Steel |
| Cover Type | Threaded Dome Cover |
| Environmental Protection | O-Ring Sealed Construction |
| Compatible System | Bently Nevada 3300 XL 8 mm Proximity Transducer System |
| Approximate Dimensions | 430 × 85 × 85 mm |
| Approximate Net Weight | 1.4 kg |
| Approximate Shipping Weight | 2.0 kg |
Typical Applications
The 21000-28-05-20-095-04-02 is developed for continuous machinery condition monitoring in industries where equipment reliability is essential.
Typical applications include:
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Steam turbines
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Gas turbines
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Centrifugal compressors
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Industrial pumps
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Electric motors
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High-speed gearboxes
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Turbo expanders
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Power generation equipment
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Petrochemical processing plants
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Oil & gas compressor stations
Its 9.5-inch probe penetration is ideal for machinery with deep bearing housings, while the 2.0-inch standoff adapter provides additional installation flexibility without compromising measurement accuracy.
Technical FAQs
1. What is the purpose of this probe housing assembly?
It provides a secure external mounting enclosure for a 3300 XL 8 mm reverse-mount proximity probe, protecting the sensor while enabling accurate shaft vibration and position monitoring.
2. Which proximity probe is included?
This configuration includes a 3300 XL 8 mm reverse-mount probe with multiple hazardous-area approvals (Option 28).
3. What does option "05" indicate?
Option 05 specifies a 0.5-meter (20-inch) integral probe cable.
4. What does the "20" option represent?
Option 20 designates a 2.0-inch (51 mm) standoff adapter, providing additional clearance between the machine housing and the probe assembly.
5. What does probe penetration "095" mean?
It specifies a 9.5-inch (241 mm) probe penetration, making this assembly ideal for equipment with deep bearing housings.
6. What is included with fitting option "04"?
Option 04 includes one 3/4-14 NPT plug only, providing a straightforward conduit configuration.
7. Which mounting thread is supplied?
The assembly uses a 3/4-14 NPT mounting thread, ensuring secure installation on industrial machinery.
8. What materials are used in the housing?
The housing is manufactured from cast aluminum with a 304 stainless-steel probe sleeve, offering excellent durability and corrosion resistance.
9. Is this model suitable for hazardous-area applications?
Yes. The included 3300 XL 8 mm probe is supplied with multiple hazardous-area approvals when installed according to applicable industrial standards.
10. Which industries commonly use this housing assembly?
It is widely installed in oil & gas, power generation, petrochemical, mining, pulp and paper, and other industries requiring continuous monitoring of critical rotating machinery.
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