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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
The 21000-16-10-00-126-04-02 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 8 mm proximity probe with multiple hazardous area approvals, featuring a 1.0-meter (40-inch) probe cable length. The assembly features a no-standoff adapter configuration (0.0 inches) and provides a precise probe penetration depth of 12.6 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 plug. Built for heavy-duty industrial rotating machinery, this assembly excels in condition monitoring applications requiring continuous, non-contact measurement of shaft vibration and axial displacement.
The robust aluminum casing provides reliable protection for the sensitive 8 mm sensor element against heavy industrial dust, lubricant splashes, and corrosive ambient environments, ensuring continuous operational uptime and preventing unpredicted machinery trips in critical process industries. 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.
Because the configured penetration depth is 12.6 inches, which exceeds the 304 mm (12-inch) mechanical threshold, additional internal sleeve support is mandatory to mitigate operational vibration associated with unsupported long lengths. For installations routing through an inner bearing housing, a Bently Nevada probe support and oil seal (Part Number 37948-01) or custom sleeve supports are applicable.
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
High-precision radial vibration and axial thrust monitoring deep within the internal bearings of high-speed centrifugal compressors, utilizing the 12.6-inch sleeve to penetrate thick multi-layered casings.
Thermal Power Generation
Micro-level shaft vibration and thermal eccentricity measurement within main steam turbine bearing housings, requiring extended sleeve lengths to reach the internal shaft surface safely from the exterior housing.
Hydroelectric Power Generation
Radial runout and low-frequency shaft vibration tracking on large vertical guide bearings, leveraging the long sleeve to pass through deep outer structural components.
LNG Liquefaction & Regasification
Precision vibration tracking on cryo-machinery, where the 12.6-inch sleeve isolates the active sensor head from the external environment while penetrating deep insulation layers.
Iron & Steel Metallurgy
Monitoring heavy-duty, high-vibration air supply systems to track unbalance caused by constant industrial dust, utilizing internal sleeve supports to eliminate vibration on the 12.6-inch length.
When using the 21000-16-10-00-126-04-02, since its sleeve length is 12.6 inches (320 mm) and exceeds the 12-inch vibration-free threshold, an additional sleeve support (such as part number 37948-01) must be installed to eliminate mechanical vibrations.
Ensure the internal probe lead is longer than 12.6 inches for a proper connection. Furthermore, because this model carries multiple hazardous area approvals including ATEX/IECEx/CSA (Option -04), certified explosion-proof cable glands must be used during installation in classified areas, and the aluminum housing's O-rings must be inspected periodically to prevent oil leakage or environmental moisture ingress.
This API 670/CSA Type 4 aluminum housing assembly integrates a 3300 XL 8 mm probe (multi-approvals) with a 1.0-meter cable. Configured with a 12.6-inch penetration depth and no standoff adapter, it utilizes a 3/4-14 NPT mounting thread and one 3/4-14 NPT plug. Supplemental internal sleeve support applies to this 12.6-inch length to mitigate operational vibration.
It is an externally mounted proximity probe housing assembly consisting of an aluminum casing, an integrated 3300 XL 8 mm proximity probe, and associated fittings, utilized for industrial condition monitoring on large rotating machinery.
How is the 21000-16-10-00-126-04-02 utilized?
The assembly mounts mechanically onto a machine casing via its 3/4-14 NPT thread. The internal probe extends through the bearing housing to perform non-contact measurement of dynamic shaft variations without breaching the casing seal.
What is the primary function of the 21000-16-10-00-126-04-02?
The primary function is to provide external mechanical protection and environmental sealing for the sensitive internal 3300 XL probe, while allowing precise online adjustment and measurement of shaft vibration or displacement.
What probe parameters are integrated within the 21000-16-10-00-126-04-02?
The assembly integrates a 3300 XL 8 mm proximity probe with multiple hazardous area approvals (Option -16) featuring a probe cable length of 1.0 meter (Option -10).
What is the linear measuring range of the 21000-16-10-00-126-04-02?
Due to the integrated 8 mm probe, the standard linear range of this assembly is 2.0 mm (80 mils) with a nominal scale factor of 7.87 V/mm (200 mV/mil).
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