



Overview
The Bently Nevada 21000-16-05-00-047-04-02 Proximity Probe Housing Assembly (3300 XL) is an externally mounted housing designed for use with the 3300 XL 8 mm reverse-mount proximity probe. It combines a lightweight aluminum housing with a corrosion-resistant 304 stainless steel probe sleeve, providing reliable mechanical protection and convenient access for inspection or replacement of the installed probe.
This factory-configured assembly includes a 3300 XL 8 mm reverse-mount probe, a 0.5 m (20 in.) integrated probe cable, a 4.7 in. (119 mm) probe penetration, one 3/4-14 NPT plug, and a 3/4-14 NPT mounting thread. The design supports external installation on rotating equipment while simplifying routine maintenance.
Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 21000-16-05-00-047-04-02 |
| Product Type | Proximity Probe Housing Assembly (3300 XL) |
| Probe Series | 3300 XL 8 mm Reverse Mount |
| Housing Material | Aluminum |
| Probe Sleeve Material | 304 Stainless Steel |
| Included Probe | 3300 XL 8 mm Reverse-Mount Probe |
| Probe Cable Length | 0.5 m (20 in.) |
| Standoff Adapter | None |
| Probe Penetration | 4.7 in. (119 mm) |
| Conduit Configuration | One 3/4-14 NPT Plug |
| Mounting Thread | 3/4-14 NPT |
| Housing Seal | O-Ring Sealed |
| Housing Cover | Threaded Aluminum Dome |
| Compatible Extension Cable | 3300 XL Extension Cable |
| Compatible Sensor | 3300 XL Proximitor Sensor |
| Operating Temperature* | -51°C to +177°C (-60°F to +351°F) |
| Overall Housing Diameter | 83.3 mm (3.28 in.) |
| Approximate Weight | 1.1 kg |
| Estimated Shipping Weight | 2.0 kg |
| Country of Origin | USA |
Common Installation Areas
This housing assembly is widely used in rotating machinery monitoring applications, including:
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Steam turbines
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Gas turbines
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Centrifugal compressors
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Pumps
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Electric motors
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Industrial fans
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Gearboxes
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Power generation equipment
Its compact 4.7-inch probe penetration makes it suitable for installations where limited mounting depth is available while maintaining convenient external access.
Technical FAQs
1. What is included with this assembly?
The assembly includes the housing, a 3300 XL 8 mm reverse-mount probe, a 0.5 m probe cable, one 3/4-14 NPT plug, and the required mounting hardware.
2. Which probe is supplied?
A genuine 3300 XL 8 mm reverse-mount proximity probe is included.
3. What is the probe penetration length?
The probe penetration is 4.7 inches (119 mm).
4. Is a standoff adapter included?
No. This configuration does not include a standoff adapter.
5. What mounting thread does the housing use?
The housing uses a 3/4-14 NPT mounting thread.
6. What material is the housing made from?
The housing body is aluminum, and the probe sleeve is manufactured from 304 stainless steel.
7. Is the housing sealed?
Yes. It uses an O-ring sealed construction together with a threaded dome cover.
8. Which extension cables are compatible?
Compatible 3300 XL Extension Cables can be used with this assembly.
9. What is the approximate product weight?
The assembled housing weighs approximately 1.1 kg, with a shipping weight of approximately 2.0 kg.
10. What equipment is this assembly commonly installed on?
It is commonly installed on turbines, compressors, pumps, generators, gearboxes, electric motors, and other rotating machinery.