Bently Nevada 21000-00-00-55-060-03-02 Proximity Probe Housing Assemblies

Product information

To externally mount proximity probes, use one of these all-metal Proximity Probe Housing Assemblies: 21000 aluminum probe housing assembly, 24701 stainless steel probe housing assembly .The 21000, 24701, and 164818 Proximity Probe Housing Assemblies consist of the following parts: A dome cover that screws into the body of the housing; Threaded ports for conduit connections; A probe sleeve of optional length; O-rings; A reverse mount proximity probe；A thread seal; Optional conduit fittings; An optional standoff adapter. 

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Frequently Asked Questions (FAQ)

Q: What type of conduit interface is configured on the external lead end of this 21000-00-00-55-060-03-02 assembly?
A: Code "03" indicates that the housing side has two 3/4-14 NPT threaded lead holes (one of which is usually blind-plugged), supporting bidirectional wiring or redundant cabling structures.

Q: What is the specification of the root master mounting thread for model 21000-00-00-55-060-03-02 used for connection to the machine housing?
A: The suffix code "02" indicates that the master mounting thread for the connection between the protective housing base and the machine surface is a 3/4-14 NPT tapered thread.

Q: Can the "03" dual 3/4 NPT interface of model 21000-00-00-55-060-03-02 be connected to the high-voltage power line and the probe signal line separately during field wiring?
A: For low-voltage sensor signal wiring only are the dual ports intended; mixing with high-voltage cables may cause electromagnetic interference and false trips.

Q: When used with a 5.5-inch extended sleeve and a 6.0-inch penetration depth, what rigid requirements are there for the total case length of the 21000-00-00-55-060-03-02 for the subsequently selected reverse-mounted probe?
A: The "55-060" configuration has fixed internal adjustment space. Probe length must follow Bentley's selection formula; otherwise, locking or shaft contact may fail.

Q: When the 21000-00-00-55-060-03-02 is deployed on the outer wall of an industrial condenser tower exposed to strong acid and alkali mists, how long does the original coating provide physical resistance?
A: Provided by the epoxy coating is resistance to oils, salt spray, and weak acids/alkalis; however, strong acids or alkalis may cause rapid aluminum pitting, requiring replacement with the 24701 all-303 stainless steel casing in severe conditions.

Application

Power Plants: Monitors shaft vibration and displacement of large steam turbine generators, feedwater pumps, and fans.

Hydropower Plants: Installed on turbine-generator shafts and thrust bearings to prevent mechanical wear and failures.

Nuclear Power Plants: Provides reliable condition monitoring for critical rotating equipment such as main pumps and turbines.

Large Steel Plants: Monitors bearing operation of blast furnace blowers and TRT systems.

Air Separation Plants: Monitors centrifugal air compressors supplying high-pressure gas for steel and chemical industries.

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