Rugged External Probe Housing for Compact Machinery Monitoring Applications
The Bently Nevada 21000-27-10-15-050-03-02 3300 XL NSv Probe Housing Assembly is a durable external mounting assembly engineered to protect 3300 XL NSv proximity probes while delivering precise shaft vibration and position measurements on critical rotating equipment. Designed as part of the proven 21000 Proximity Probe Housing Assembly family, this assembly combines a corrosion-resistant aluminum housing with a stainless-steel probe sleeve, providing dependable performance in demanding industrial environments. Its modular design simplifies installation, probe adjustment, and routine maintenance while protecting the sensing system from moisture, dust, oil, and mechanical damage.
This configuration includes a 3300 XL NSv reverse-mount proximity probe with selectable hazardous-area approvals, a 1.0 m (39 in.) probe cable, a 1.5 in. (38 mm) standoff adapter, a 5.0 in. (127 mm) probe penetration, Option 03 cable seal fittings, and a 3/4-14 NPT mounting thread. The design is fully compatible with API 670-style machinery protection systems and is ideal for installations where compact probe dimensions and hazardous-area approvals are required.
Product Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 21000-27-10-15-050-03-02 |
| Product Type | 3300 XL NSv Probe Housing Assembly |
| Housing Series | 21000 |
| Housing Material | Cast Aluminum |
| Probe Sleeve Material | 304 Stainless Steel |
| Probe Included | 3300 XL NSv Reverse-Mount Proximity Probe (Selectable Hazardous-Area Approvals) |
| Probe Cable Length | 1.0 m (39 in.) |
| Standoff Adapter Length | 1.5 in. (38 mm) |
| Probe Penetration | 5.0 in. (127 mm) |
| Fitting Option | Option 03 – Cable Seal Grip with Grommets, 3/4-14 NPT Plug and Reducer |
| Mounting Thread | 3/4-14 NPT |
| Cover Type | Threaded Dome Cover |
| Environmental Protection | O-Ring Sealed Housing |
| Compatible Systems | 3300 XL NSv Proximity Transducer Systems |
| Typical Housing Weight | Approx. 1.1 kg (without fittings) |
| Approximate Shipping Weight | 1.9 kg |
Industrial Applications
The 21000-27-10-15-050-03-02 is designed for continuous condition monitoring of rotating equipment operating in harsh industrial environments.
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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Process fans and blowers
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Petrochemical processing equipment
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Pipeline compressor stations
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Power generation facilities
Its combination of a compact NSv probe and protected external housing makes it particularly suitable for installations where radial space is limited while maintaining high measurement accuracy.
Technical FAQs
1. What is the purpose of the 21000-27-10-15-050-03-02 housing assembly?
It provides a protected enclosure for a 3300 XL NSv reverse-mount proximity probe, ensuring accurate shaft vibration and position measurements while protecting the probe from harsh environmental conditions.
2. Which probe is supplied with this model?
This configuration includes a 3300 XL NSv reverse-mount proximity probe with selectable hazardous-area approvals (Option 27).
3. What does option "10" indicate?
Option 10 specifies a 1.0-meter (39-inch) integral probe cable.
4. What does option "15" represent?
It specifies a 1.5-inch (38 mm) standoff adapter that provides additional installation clearance between the housing and the machine surface.
5. What does option "050" indicate?
Option 050 specifies a 5.0-inch (127 mm) probe penetration length. Probe penetration options are ordered in 0.1-inch increments to suit different bearing housing depths.
6. What is included in fitting option "03"?
Option 03 includes a cable seal grip with interchangeable grommets, one 3/4-14 NPT plug, and one 3/4-14 to 1/2-14 NPT reducer for secure cable sealing and conduit connection.
7. Which mounting thread is provided?
This configuration uses a 3/4-14 NPT mounting thread, providing a secure and rigid installation suitable for industrial machinery.
8. What materials are used in the housing?
The housing features a cast aluminum body with a 304 stainless-steel probe sleeve, offering excellent durability and corrosion resistance.
9. Is this assembly suitable for hazardous locations?
Yes. The supplied 3300 XL NSv probe is available with selectable hazardous-area approvals, making it suitable for installations requiring certified sensing equipment.
10. Which industries commonly use this housing assembly?
It is widely used in power generation, oil & gas, petrochemical, mining, pulp and paper, water treatment, and other industries operating critical rotating machinery.
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