Bently Nevada 21000-28-05-00-130-04-02 Proximity Probe Housing Assemblies

Performance Specifications

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. 

Frequently Asked Questions

Q: What configuration does the complete model code 21000-28-05-00-130-04-02 represent?
A: An aluminum housing external probe protection assembly with an integrated 3300 XL 8mm probe is provided. Its suffix details are defined as: a connector protector is included with hazardous area approval, 0.5 m probe cable, no Standoff Adapter, 13.0-inch probe penetration, 3/4-14 NPT plug, and standard 3/4-14 NPT process thread.

Q: What is the purpose of an external mounting assembly like 21000-28-05-00-130-04-02 in rotating machinery?
A: This assembly complies with API 670 standards and is mainly used for external installation or replacement of non-contact eddy current probes on large machines.

Q: What environmental protection level does the aluminum housing of 21000-28-05-00-130-04-02 provide?
A: This assembly has passed CSA Type 4 enclosure protection certification (equivalent to IP66), providing complete dust protection and protection against strong water jets from all directions. It is suitable for dusty, oily, humid, or rainy outdoor industrial environments.

Q: Why is the sleeve depth (13.0 inches) selection critical when using 21000-28-05-00-130-04-02?
A: The sleeve depth defines the probe measurement position inside the machine. If the length exceeds 12 inches (13 inches for this model), an internal probe sleeve support is recommended to reduce resonance caused by excessive cantilever length during operation.

Q: What is the standard DC resistance when testing the 0.5 m probe built into 21000-28-05-00-130-04-02?
A: Since it is configured with a 0.5 m cable length 3300 XL 8mm reverse mount probe, the standard DC resistance between the center conductor and outer shield is typically within 7.45 ± 0.50 Ω.

Applicaiton

Power Plants: External bearing housing installation on turbines, generators, and boiler feed pumps for shaft vibration and axial position monitoring.

LNG Plants: High-safety speed and phase monitoring for gas turbines and pipeline compressors.

Steel Plants: Protection for blast furnace blowers and TRT oil-film bearings in harsh environments.

Fertilizer & Ethylene Plants: Differential expansion monitoring for air separation units and ammonia compressors, enabling online probe replacement.

Oil Refineries: Hazardous-area protection for centrifugal compressors and FCC blowers.

Strategic Benefits for Your Business

· Access to leading global brands including ABB, GE, Siemens, Bently Nevada, Triconex, and more.

· Continuous availability of rare, obsolete, and hard-to-source components.

· Trusted, dependable product quality for every order.

· Competitive pricing designed to maximize your savings.

· A large, fully stocked inventory prepared for immediate dispatch.

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