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Proximity Probe Housing Assembly
Certified as a CSA Type 4 weatherproof and dustproof enclosure
Fully compliant with the American
Petroleum Institute's (API) 670 Standard
Technical specifications for 21000-34-05-00-040-03-02
Technical specifications for 21000-34-05-00-040-03-02
Manufacturer:
Bently Nevada
Product Category:
Machinery Monitoring System
Spare Part Number:
21000-34-05-00-040-03-02
Estimated shipping dimensions:
31x8.5x8.5cm
Weight:
1.4 kg
Tariff Code:
8537101190
Counliy of origin:
USA
Probe with Connector:
3300 XL 8mm probe with connector protector, selectable hazardous area approvals
Probe Cable Length:
0.5 m (20 in)
Standoff Adapter:
No standoff adapter
Probe Penetration:
4.0 in (102 mm)
Fittings:
One 3/4-14 NPT plug One 3/4-14 to 1/2-14 NPT reducer One cable seal grip with grommets for the following cable sizes: • 1/8 to 3/16 inches • 1/4 to 5/16 inches • 5/16 to 3/8 inches
The 21000-34-05-00-040-03-02 is an Aluminum Proximity Probe Housing Assembly with Canadian Standards Association (CSA) approvals. It carries an explosion-proof rating for hazardous areas and applies to intrinsically safe installations. The housing functions as a certified CSA Type 4 enclosure and maintains full compliance with the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings.
Threaded ports for conduit connections
Optional conduit fittings
A dome cover that screws into the body of the housing
This specific configuration incorporates a 3300 XL 11 mm proximity probe with multiple hazardous area approvals, featuring a 0.5-meter (20-inch) probe cable length. The assembly features a no-standoff adapter configuration (0.0 inches) and provides a precise probe penetration depth of 4.0 inches. For mechanical installation, it utilizes a 3/4-14 NPT mechanical mounting thread and includes a fittings configuration of one 3/4-14 NPT elbow.
Built for heavy-duty industrial rotating machinery, this assembly excels in high-reliability environments where precise tracking of larger target movements or increased measuring ranges is required. The integrated 3300 XL 11 mm proximity probe provides a wider linear range compared to standard 8 mm sensors, making it applicable for monitoring larger shaft displacements, differential expansion, or axial thrust position in massive turbomachinery. The robust aluminum casing provides reliable protection for the sensor elements against heavy industrial dust, moisture ingress, and ambient temperature fluctuations, ensuring continuous operational uptime and preventing unpredicted machinery trips in critical process industries.
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 Refining
Continuous measurement of dynamic shaft displacement and large axial thrust positioning within high-pressure centrifugal compressors to prevent internal rotor contact and catastrophic seal breakdown.
Petrochemical & Chemical Processing
Real-time tracking of massive shaft vibration and differential housing expansion in critical process machinery transferring hazardous, volatile, or extreme-temperature compounds.
Thermal Power Generation
Absolute shaft vibration and large-scale thermal growth (axial displacement) monitoring during turbine startup phases, load synchronization, and continuous peak-load operation.
Nuclear Power Plants
High-reliability shaft vibration, runout, and eccentricity measurement within non-nuclear island power generation loops to support continuous base-load grid availability.
Hydroelectric Power Generation
Low-frequency radial vibration, eccentricity, and structural runout tracking on massive vertical shafts to monitor hydraulic imbalance and guide bearing stability.
Cement & Building Materials
Heavy bearing housing protection and transmission shaft vibration monitoring on heavy industrial kiln drives operating under intense dust exposure and high ambient heat.
The sleeve length of this assembly depends directly on the location in which the probe and housing are installed, ensuring the probe lead remains longer than the sleeve. Since the configured penetration depth is 4.0 inches, it operates safely within vibration limits without auxiliary bracing.
For applications where alternative configurations require unsupported sleeve lengths exceeding 304 mm (12 inches), additional sleeve support is mandatory to mitigate vibration. For installations routing through an inner bearing housing, a Bently Nevada probe support and oil seal (Part Number 37948-01) or custom sleeve supports can be utilized.
21000-34-05-00-040-03-02 is an API 670 aluminum probe housing featuring a 3/4-14 NPT process connection, M10x1 probe thread, and 1/2-14 NPT conduit port (no plugs). Its 4.0-inch (102 mm) sleeve requires no extra support. It is CSA explosion-proof certified and supports online, non-shutdown probe adjustment to reduce machinery downtime.
What is the Bently Nevada 21000-34-05-00-040-03-02?
It is an aluminum proximity probe housing assembly manufactured by Bently Nevada with CSA explosion-proof approvals. It is specifically designed to provide physical protection for vibration sensors mounted externally on rotating machinery.
How to properly use a product like the 21000-34-05-00-040-03-02?
Thread the assembly onto the exterior of the machine's bearing housing. Insert a proximity probe with a matching thread (e.g., M10x1) inside, and adjust the sleeve depth to precisely monitor mechanical shaft vibration, position, or rotational speed.
What is the conduit (electrical) connection size for the 21000-34-05-00-040-03-02?
The -05 option code represents that the conduit entry (electrical connection port) features a standard industrial 1/2-14 NPT thread.
Does the 21000-34-05-00-040-03-02 comply with API 670 industry standards?
Yes. It fully complies with all technical specifications and requirements of the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings.
Does the 21000-34-05-00-040-03-02 support "online probe maintenance" without shutting down equipment?
Yes. One of its core benefits is allowing technicians to externally adjust the internal probe's gap or perform routine maintenance rapidly without removing the main housing or shutting down the machinery.
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