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Proximity Probe Housing Assemblies

Bently Nevada offers two all-metal Proximity Probe Housing Assemblies for external mounting of proximity probes: the 21000 aluminum probe housing assembly, and the 24701 stainless steel probe housing assembly. These housings consist of a dome cover that screws into the body of the housing, threaded ports for conduit connections, a probe sleeve of optional length, 0- rings, a reverse mount proximity probe, a thread seal, optional conduit fittings and an optional standoff adapter. Use of a proximity probe housing allows external access to the proximity probe and its extension cable, permitting gap adjustment or probe replacement without disassembly of the machine. Note: A newer 31000/32000 proximity probe housing assembly is available with more flexible mounting options, better environmental resistance, and other improved features. It is recommended for installations where an explosion proof housing is not required. Consult specifications and ordering information (p/n 141610-01).

Both the 21000 and the 24701 housing assemblies are available in a Canadian Standards Association (CSA) approved version that is rated explosion proof in hazardous areas. In addition, CSA and BASEEFA approved proximity probes can also be ordered with both 21000 aluminum and 24701 stainless steel housings for intrinsically safe applications. Both housings are certified as CSA Type 4 enclosures, and both are fully compliant with the American Petroleum Institute’s (API) 670 Standard for externally mounted proximity probe housings. Sleeve length is determined by the location in which the probe and housing will be installed. The probe lead must be longer than the sleeve.

Sleeve lengths longer than 304 mm (12 inches) require additional sleeve support in order to reduce the vibration associated with unsupported long sleeve lengths. A probe support/oil seal, P/N 37948-01, is available to support long sleeves going through an inner bearing housing, or the customer or BNC can provide a custom sleeve support (see Figure 1. “Proximity Probe Housing Assemblies Dimensions are in millimetres (inches)” on page 7).

Ordering Information Proximity Probe Housing Assemblies

21000-AXX-BXX-CXX-DXXX-EXX-F02

24701-AXX-BXX-CXX-DXXX-EXX-FXX

Explosion-Proof Housing Assemblies

CA21000-AXX-BXX-CXX-DXXX-EXX-F02

CA24701-AXX-BXX-CXX-DXXX-EXX-FXX

A: Probe Option, With Connector:

0 0 Probe not required

1 6 3300 XL 8 mm probe

2 6 3300 NSV probe

2 7 3300 NSV probe, multiple approvals

2 8 3300 XL 8 mm probe, multiple approvals

2 9 3300 XL 11 mm probe

3 0 3300 XL 11 mm probe, multiple approvals

3 1 3300 NSV probe with connector protector

3 2 3300 NSV probe with connector protector, multiple approvals

3 3 3300 XL 8 mm probe with connector protector

3 4 3300 XL 8 mm probe with connector protector, multiple approvals

3 5 3300 XL 11 mm probe with connector protector

3 6 3300 XL 11 mm probe with connector protector, multiple approvals

Note: If option -00 (probe not required) is selected for Option A, then Option B (Probe Cable Length Option) must also be – 00. Order only multiple approvals probes for CA21000 or CA24701 housings.

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