Compact External Probe Housing for Reliable Machinery Protection
The Bently Nevada 21000-16-10-25-056-03-03 Proximity Probe Housing Assembly is a durable external mounting solution developed to protect proximity probes while ensuring accurate shaft vibration and position measurements on critical rotating equipment. Part of the trusted 21000 Proximity Probe Housing Assembly series, this model combines a rugged aluminum housing with a stainless-steel probe sleeve to provide dependable performance in demanding industrial environments. Its enclosed design protects the probe from contaminants, moisture, and mechanical damage while allowing convenient adjustment during installation and maintenance.
This configuration is supplied with a 3300 XL 8 mm reverse-mount proximity probe, a 1.0 m (39 in.) probe cable, a 2.5 in. (64 mm) standoff adapter, a 5.6 in. (142 mm) probe penetration, Option 03 cable seal grip fittings, and a 1-11½ NPT mounting thread. The assembly is designed for continuous online monitoring in vibration protection systems used throughout the power generation, oil & gas, petrochemical, and process industries.
Product Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 21000-16-10-25-056-03-03 |
| Product Type | Proximity Probe Housing Assembly |
| Housing Series | 21000 |
| Housing Material | Cast Aluminum |
| Probe Sleeve Material | 304 Stainless Steel |
| Probe Included | 3300 XL 8 mm Reverse-Mount Proximity Probe |
| Probe Cable Length | 1.0 m (39 in.) |
| Standoff Adapter Length | 2.5 in. (64 mm) |
| Probe Penetration | 5.6 in. (142 mm) |
| Fitting Option | Option 03 – Cable Seal Grip with Grommets |
| Mounting Thread | 1-11½ NPT |
| Cover Type | Threaded Dome Cover |
| Sealing Method | O-Ring and Thread Seal |
| Compatibility | 3300 XL Proximity Transducer Systems |
| Approximate Dimensions | Determined by sleeve and standoff configuration |
| Approximate Net Weight | 2.9 kg |
| Approximate Shipping Weight | 3.5 kg |
Typical Applications
The 21000-16-10-25-056-03-03 is engineered for reliable external probe mounting on a wide variety of rotating machinery, including:
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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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Generators
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Petrochemical process equipment
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Pipeline compressor stations
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Heavy-duty manufacturing machinery
Its moderate probe penetration and extended standoff adapter make it suitable for installations where additional clearance is required while maintaining excellent probe stability.
Technical FAQs
1. What is the purpose of this housing assembly?
It provides a secure, weather-resistant enclosure for a reverse-mounted proximity probe while supporting accurate shaft vibration and position measurements.
2. Which probe is supplied with this configuration?
The assembly includes a 3300 XL 8 mm reverse-mount proximity probe (Option 16).
3. What does option "10" indicate?
Option 10 specifies a 1.0-meter (39-inch) integral probe cable.
4. What does option "25" represent?
It designates a 2.5-inch (64 mm) standoff adapter, providing additional spacing between the housing and mounting surface.
5. What does option "056" indicate?
Option 056 specifies a 5.6-inch (142 mm) probe penetration length. Probe penetration options are ordered in 0.1-inch increments.
6. What is included with fitting option "03"?
Option 03 includes a cable seal grip with interchangeable grommets for multiple cable diameters, improving sealing performance and strain relief.
7. What mounting thread does option "03" specify?
Option 03 provides a 1-11½ NPT mounting thread for applications requiring increased mounting strength and stiffness.
8. What materials are used in the housing?
The housing is manufactured from cast aluminum, while the probe sleeve is constructed from 304 stainless steel for enhanced durability and corrosion resistance.
9. Is this housing suitable for continuous online monitoring?
Yes. It is designed for permanent installation in machinery protection and condition monitoring systems operating continuously.
10. Which industries commonly use this assembly?
It is widely installed in power generation, oil & gas, petrochemical, mining, pulp and paper, water treatment, and other industrial facilities operating critical rotating equipment.
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