Product Number: 21000-28-05-15-50-03-02
Model: Proximity Probe Housing Assemblies
Manufacturer: Bently Nevada
Condition: New & Original in Factory Packing
Factory Warranty: 12 Months
Ordering Information
Model: 21000 - Proximity Probe Housing Assemblies
Suffix Codes:
Probe Option, with Connector: -28 - 3300 XL 8 mm probe, multiple approvals
Probe Cable Length Option: -05 - 0.5 metre (20 in)
Standoff Adapter: -15 - 1.5 in (38 mm)
Probe Penetration: -050 - 5.0 in
Fitting Option: -03 - One 3/4-14 NPT plug; one 3/4-14 to 1/2-14 NPT reducer; one cable seal grip with grommets for cable sizes: 1/8 to 3/16, 1/4 to 5/16, and 5/16 to 3/8-in
Mounting Thread Option: -02 - 3/4-14 NPT (Must be ordered if Standoff Adapter Length Option is not -00)
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.
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).
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