The Bently Nevada 21000-16-05-00-071-03-02 is a heavy-duty aluminum housing designed to protect proximity transducers in industrial rotating machinery. This assembly enables “external gapping,” allowing technicians to install, adjust, or replace probes from outside the machine casing. By eliminating the need to remove large machine covers, this housing significantly reduces maintenance labor and operational downtime.
Technical Characteristics and Material Specs
- Housing Material: Aluminum (Option 16)
- Probe Penetration: 7.1 inches (180.3 mm)
- Mounting Thread: 3/4-14 NPT (Option 05)
- Conduit Thread: 3/4-14 NPT (Option 00 – standard)
- Weight: Approximately 1.08 kg
- Environmental Rating: IP66 / CSA Type 4 (Weatherproof)
- System Compatibility: 3300 and 3300 XL Proximity Transducer Systems
Primary Industrial Applications
Engineers primarily utilize this assembly for radial vibration and axial thrust measurements. It serves as a critical component in Turbine Supervisory Instrumentation (TSI) for power plants and refineries. Common equipment installations include large steam turbines, centrifugal compressors, and cooling tower fans. The robust seal prevents lubricating oil from leaking out while blocking contaminants from entering the machine.
Operational Advantages
The 21000 series design emphasizes ease of service. The 7.1-inch penetration allows the sensor to reach shafts through thick insulation or double-walled casings. Furthermore, the 3/4-14 NPT mounting ensures a secure, leak-proof fit into the machine housing. While the 31000 series offers chemical resistance via PPS plastic, this 21000 aluminum version provides superior mechanical toughness for standard industrial use.
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