Bently Nevada · 21000 Housing
Bently Nevada 21000-11-05-00-085-03-02 21000 External Proximity Probe Housing
Compact 8.5 in penetration assembly with 0.5 m probe cable
Product Description
21000-11-05-00-085-03-02 is a 21000 series external proximity-probe housing that protects a legacy configured sensing point. The aluminum enclosure and 304 stainless-steel sleeve form the mechanical path between the accessible connector space and the probe at the target.
Its order code carries legacy probe option 11, a 0.5 m cable, no standoff adapter and an 8.5 in penetration. The option-03 fitting kit combines the required plug, reducer and cable seal grip, and the housing mounts through a 3/4-14 NPT interface.
Compared with longer 21000 executions, 21000-11-05-00-085-03-02 remains below the 12 in sleeve-support threshold. Correct alignment, cable sealing and final gap verification are still required before the monitoring channel is released.
Technical Specifications
| Technical Item | 21000-11-05-00-085-03-02 |
|---|---|
| Brand | Bently Nevada |
| Product Type | 21000 external proximity probe housing |
| Brand Country | United States |
| Housing Body | Aluminum |
| Sleeve Material | 304 stainless steel |
| Typical Mass | 1.1 kg (2.4 lb), without fittings |
| Probe Option | 11 — legacy configured probe |
| Probe Cable Length | 0.5 m (20 in) |
| Standoff Adapter | 00 — none |
| Probe Penetration | 8.5 in |
| Fittings | 03 — plug, reducer and cable seal grip |
| Mounting Thread | 3/4-14 NPT |
| Conduit Thread | 3/4 NPT |
| Sleeve Diameter | 12.7 mm (0.50 in) |
Legacy Probe Chain Compatibility
The housing accepts the probe, cable and connector configuration represented by legacy option 11; that selection must stay paired with the installed extension cable, Proximitor Sensor and monitor channel. A similar 21000 enclosure does not prove transducer-system compatibility.
Mechanical compatibility also depends on the 8.5 in penetration, 3/4-14 NPT casing interface and option-03 conduit hardware. Match these fields to the machine drawing before transferring the installed probe chain into a replacement housing.
Housing Sealing & Cable Protection
Housing Sealing & Cable Protection in practice
The all-metal enclosure separates the accessible cable connection from the machine-side probe while the 304 stainless-steel sleeve passes through the casing. The cover, conduit fitting and cable seal must remain closed to limit oil, dust and moisture entry.
Use the probe temperature limit that belongs to the installed legacy transducer, not a value inferred from the housing alone. Keep the cable free from sharp bends, inspect the sleeve for contact or vibration, and confirm a stable channel reading after the machine reaches operating conditions.
Frequently Asked Questions
Does the 8.5 in penetration of 21000-11-05-00-085-03-02 require the same added support as a long sleeve?
The 8.5 in penetration is below the 12 in threshold used for the added support recommendation. Even so, inspect alignment and make sure the sleeve does not contact surrounding machine parts or vibrate during operation.
Can a different legacy probe option be installed in 21000-11-05-00-085-03-02 because the housing looks identical?
Do not select by enclosure appearance. Retain option 11 with the full model and verify the existing extension cable, Proximitor Sensor, monitor channel and mechanical penetration before substitution.
What should be checked when the 0.5 m probe cable in 21000-11-05-00-085-03-02 does not reach the connection point?
Option 05 fixes the integral probe cable at 0.5 m. Recheck the housing position and connector routing; if the required distance is longer, choose the correct cable-length configuration instead of applying tension or adding an unapproved joint.
How can leakage around the conduit side of 21000-11-05-00-085-03-02 be reduced?
Install the option-03 plug, reducer and cable-seal grip correctly in the 3/4 NPT conduit arrangement. Tighten and inspect each interface, keep the cable centered in the grommet and verify the enclosure is dry before reconnecting the channel.
What should be done if 21000-11-05-00-085-03-02 reads normally when cold but drifts after startup?
Check the installed probe’s own temperature rating rather than assigning the housing a transducer temperature limit. Inspect sleeve alignment, cable condition and gap voltage at operating temperature to separate mechanical movement from an electrical fault.
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