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The 21000-28-05-00-47-01-02 functions as an explosion-proof housing to protect Bently Nevada 3300 XL 8mm proximity probes in harsh industrial environments. Constructed from an aluminum alloy body with a 304 stainless steel sleeve, it provides a lightweight and durable solution for vibration damping. It offers robust mechanical shielding, environmental sealing, and CSA Type 4 hazardous area certification for critical rotating machinery monitoring.
Strictly complies with the API 670 standard
Equipped with standard 3/4-14 NPT explosion-proof fittings
Features CSA Type 4 weatherproof and dustproof certification
The 21000, 24701, and 164818 Proximity Probe Housing Assemblies are available with Canadian Standards Association (CSA) approvals. They are rated explosion proof for hazardous areas. The 21000-28-05-00-47-01-02 device threads directly into the bearing housing walls of large rotating machinery, such as steam and gas turbines, via its 3/4-14 NPT mounting thread. Its stainless steel extension sleeve provides a 4.7-inch penetration depth to guide and secure the internal probe precisely near the target shaft surface. For electrical routing, the aluminum enclosure configuration includes one 3/4-14 NPT explosion-proof fitting and one sealing plug of the same size, with the internal cable pathway accommodating a 0.5-meter sensor cable. In field maintenance, this structure supports direct external probe gap adjustments or full component replacements from the outside without requiring machinery shutdowns or casing disassembly.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Oil & Gas Exploration and Production
Protects vibration monitoring sensors on large water injection pumps and natural gas export compressors used on offshore drilling platforms and onshore oilfields.
Petroleum Refining Industry
Used for axial displacement and shaft vibration protection of core flue gas turbines and high-pressure rich gas compressors in refinery catalytic cracking units.
Petrochemical & Chemical Industry
Provides explosion-proof and mechanical protection for sensors on large "three-compressor trains" including cracking gas compressors and propylene compressors in ethylene plants.
Thermal Power Generation Industry
Monitors and protects bearing vibration sensors on main steam turbines, high-power boiler feedwater pumps, and induced draft fans in supercritical thermal power units.
Hydroelectric Power
Installed on thrust and guide bearings of large hydro-generator units to protect sensors monitoring shaft swing and vibration.
Nuclear Power Industry
Provides robust protection for high-dynamic vibration monitoring probes on main steam turbine-generator sets in the conventional island and main coolant pumps in the nuclear island.
During use, ensure all housing threads and connections are properly sealed to prevent moisture and corrosive gases from entering, and strictly follow explosion-proof wiring standards when installing in hazardous areas. Additionally, avoid over-threading when adjusting the probe gap to prevent mechanical impact between the probe tip and the shaft surface, and routinely inspect the internal O-rings for signs of wear or degradation.
21000-28-05-00-47-01-02 is an API 670 aluminum probe housing by Bently Nevada. It integrates a 3300 XL 8mm probe with CSA Type 4 explosion-proof rating. Used for turbine shaft vibration monitoring, its key benefit is allowing online, external probe maintenance without downtime.
It is an industrial-grade proximity probe housing assembly consisting of an aluminum body and a built-in 3300 XL 8mm transducer probe.
What is the housing material of 21000-28-05-00-47-01-02?
The housing material of 21000-28-05-00-47-01-02 is aluminum alloy with a 304 stainless steel sleeve.
Which international standards does 21000-28-05-00-47-01-02 comply with?
It fully complies with the American Petroleum Institute's API 670 Standard and holds hazardous area certifications from agencies like CSA.
What is the primary application of 21000-28-05-00-47-01-02?
It is used for shaft vibration, axial position, and keyphasor measurements on critical rotating machinery like turbines and compressors in oil, petrochemical, and power industries.
How to use products like 21000-28-05-00-47-01-02?
Screw it into the machine's bearing housing via the bottom thread, position the internal probe tip close to the rotating shaft surface, and connect it to a Proximitor via the external cable.
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