Typical system use
The 21000 housing is used for external mounting of a proximity probe in a machinery monitoring installation, giving maintenance personnel external access to the probe and cable.
Brand Name:
Bently Nevada
Configured 21000 aluminum proximity probe housing assembly with a 300 nuclear probe configuration, 1.0 m probe cable, no standoff adapter, 16.6 in probe penetration, specified fittings, and a 3/4-14 NPT mounting thread.
Bently Nevada describes the 21000 as an all-metal proximity probe housing assembly for external mounting of proximity probes. The housing provides external access to the probe and its extension cable, allowing probe gap adjustment or probe replacement without disassembling the machine.
| Manufacturer | Bently Nevada |
| Product family | 21000 Proximity Probe Housing Assemblies |
| Housing body | Aluminum |
| Probe sleeve | 304 stainless steel |
| Probe configuration | Option 15 — 300 nuclear |
| Probe cable length | Option 10 — 1.0 m (39 in) |
| Standoff adapter | Option 00 — none |
| Probe penetration | Option 166 — 16.6 in (421.6 mm) |
| Fittings | Option 03 — 3/4-14 NPT plug; 3/4-14 to 1/2-14 NPT reducer; cable seal grip with grommets |
| Mounting thread | Option 02 — 3/4-14 NPT |
| Probe penetration adjustment | 13 mm (±0.5 in) |
| Typical housing mass | 1.1 kg (2.4 lb), without fittings |
| Maximum C + D dimension with 1.0 m cable | 742 mm (29.2 in) |
| Housing dimensions | 83.3 × 161.6 mm |
Bently Nevada specifies additional sleeve support near the probe when the selected probe penetration exceeds 300 mm (12 in), to reduce resonance associated with unsupported long sleeve lengths. This configuration is 16.6 in (421.6 mm), so the support requirement applies to this ordered arrangement.
The 21000 housing is used for external mounting of a proximity probe in a machinery monitoring installation, giving maintenance personnel external access to the probe and cable.
It may be searched when an installed 21000 housing needs replacement, when the housing or its specified fittings are damaged, or when external probe access must be restored for gap adjustment or probe replacement.
A damaged or unusable housing can prevent the intended probe installation or maintenance work and may leave the associated proximity measurement channel unavailable until the mechanical installation is restored.
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