Dependable External Probe Housing for Continuous Machinery Protection
The Bently Nevada 21000-28-10-00-041-04-02 3300 XL Probe Housing Assembly is engineered to provide reliable protection and precise positioning for 3300 XL 8 mm reverse-mount proximity probes in demanding industrial environments. As a member of the proven 21000 Series, this housing assembly is designed to simplify installation, facilitate probe adjustment, and protect sensing components from contamination, vibration, and mechanical damage. Its rugged aluminum construction and corrosion-resistant stainless-steel sleeve make it an excellent solution for long-term vibration monitoring and shaft position measurement on mission-critical rotating equipment.
This configuration features a 3300 XL 8 mm probe with selectable hazardous-area approvals, a 1.0 m (39 in.) integral cable, no standoff adapter, a 4.1 in. (104 mm) probe penetration, Option 04 conduit fittings, and a 3/4-14 NPT mounting thread. The compact probe penetration makes it well suited for standard bearing housings while maintaining excellent measurement stability.
Product Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 21000-28-10-00-041-04-02 |
| Product Type | 3300 XL Probe Housing Assembly |
| Housing Series | 21000 |
| Probe Type | 3300 XL 8 mm Reverse-Mount Probe |
| Hazardous Area Approval | Selectable Approvals |
| Probe Cable Length | 1.0 m (39 in.) |
| Standoff Adapter | None (Option 00) |
| Probe Penetration | 4.1 in. (104 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 Style | Threaded Dome Cover |
| Environmental Protection | O-Ring Sealed Construction |
| Compatible System | Bently Nevada 3300 XL 8 mm Proximity Transducer System |
| Approximate Dimensions | 275 × 85 × 85 mm |
| Approximate Net Weight | 1.1 kg |
| Approximate Shipping Weight | 2.0 kg |
Typical Applications
Designed for continuous machine condition monitoring, this housing assembly is commonly installed on:
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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 generators
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Petrochemical processing equipment
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Oil & gas compressor stations
Its 4.1-inch probe penetration provides an ideal solution for standard bearing housings where stable probe positioning and dependable signal quality are required.
Technical FAQs
1. What is the purpose of this housing assembly?
It provides external mounting and environmental protection for a 3300 XL 8 mm proximity probe, enabling accurate shaft vibration and position monitoring on rotating machinery.
2. Which probe is supplied with this model?
It includes a 3300 XL 8 mm reverse-mount probe with selectable hazardous-area approvals (Option 28).
3. What does option "10" represent?
Option 10 specifies a 1.0-meter (39-inch) integral probe cable.
4. What does option "00" indicate?
It means the assembly is supplied without a standoff adapter, allowing direct installation on the machine housing.
5. What does probe penetration "041" mean?
It specifies a 4.1-inch (104 mm) probe penetration length suitable for many standard bearing housing applications.
6. What is included with fitting option "04"?
Option 04 includes one 3/4-14 NPT plug only, providing a simple conduit configuration.
7. Which mounting thread is used?
This configuration uses a 3/4-14 NPT mounting thread.
8. What materials are used?
The housing features a cast aluminum body with a 304 stainless-steel probe sleeve, offering durability and corrosion resistance.
9. Is this assembly suitable for hazardous locations?
Yes. The included probe is available with selectable hazardous-area approvals for certified industrial applications when installed according to applicable regulations.
10. Which industries commonly use this product?
It is widely used in oil & gas, petrochemical, power generation, mining, pulp & paper, water treatment, and other industries that rely on continuous monitoring of rotating machinery.
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