Bently Nevada 21022-28-05-017-03 Dual Axial Probe Housing Assembly

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21022-28-05-017-03 Overview

The 21022-28-05-017-03 Dual Axial Probe Housing Assembly consists of two proximity probes installed in an externally mounted protective enclosure. It is intended for mounting on the end of a machine nearest the thrust bearing to allow both probes to observe the end of the shaft for axial thrust position movement. The enclosure mounts on the machine case using four standard machine screws. The probes are mounted in sleeve/adapter assemblies, which are installed directly onto the machine case through two 3/4-in NPT threaded holes.

21022-28-05-017-03 Parameters

Housing Material:Aluminum alloy housing (sand cast, 0.3% copper free)
Sleeve Material:304 stainless steel
Temperature Range:-51°C to +177°C (-60°F to +351°F) for compatible probes

FAQ about 21022-28-05-017-03

1. What does option "28" for the probes indicate?

Option "28" specifies two 3300 XL 8mm probes with Multiple Approvals. This means both probes are certified for use in hazardous locations with multiple approvals including CSA, ATEX, and IECEx for intrinsically safe (ia) and non-incendive (nA/ec) applications.

2. What is the probe penetration dimension (option "017")?

The "017" option indicates a probe penetration of 1.7 inches (43 mm) . This is the length that the probe sleeves extend into the machine from the mounting surface. For penetration lengths between 1.0 and 2.0 inches, counter-boring may be required in the machine case to reduce probe side view and/or rear view effects .

3. What is the purpose of this dual axial housing?

It is intended for mounting on the end of a machine nearest the thrust bearing to allow both probes to observe the end of the shaft for axial thrust position movement. The dual configuration provides redundancy and allows for cross-checking of measurements.

4. Is this housing assembly suitable for hazardous area installations?

Yes, both the housing and the included probes are suitable for hazardous areas. The housing itself provides explosion-proof protection, and the probes carry Multiple Approvals (CSA, ATEX, IECEx) for use in intrinsically safe applications.

5. What is the purpose of the fittings option "03"?

Option "03" provides two cable seal grips with grommets (for various cable sizes) and two 3/4-14 to 1/2-14 NPT reducers. These fittings allow for proper sealing of the cable entries to maintain the environmental integrity of the housing.

6.What is the total probe cable length?

Each probe has a cable length of 0.5 meter (20 inches) as specified by option "05". These short cables are typically connected to extension cables within a junction box near the housing.