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The 330881-28-00-050-03-02 is a Bently Nevada PROXPAC XL Proximity Transducer Assembly. It innovatively integrates an 8mm eddy current probe and a Proximitor sensor within a single IP66/Type 4X explosion-proof, anti-static housing, completely eliminating the need for conventional intermediate extension cables.
Integrates probe and Proximitor to completely eliminate extension cables and reduce failures
Advanced PPS housing with IP66/Type 4X rating and anti-static features for severe environments
Features 50mm depth and 3/4-14 NPT thread for direct installation without a separate box
The design of the PROXPAC XL Proximity Transducer Assembly is similar to our 31000/32000 Proximity Probe Housing Assemblies. The assembly offers the same advantages and features as the 31000 and 32000 housings for accessing and externally adjusting proximity probes. However, the housing cover of the PROXPAC XL Assembly also contains its own 3300 XL Proximitor sensor.
This design makes the PROXPAC XL Assembly a completely self-contained proximity probe system, and eliminates the need for an extension cable between the probe and its associated Proximitor sensor. It also eliminates the need for a separate Proximitor housing, as the field wiring connects directly between the monitors and PROXPAC XL Assemblies. The PROXPAC XL housing is made of Polyphenylene Sulfide (PPS), which is an advanced, molded thermoplastic.
This material replaces the steel and aluminum in previous housings offered in the Bently Nevada product line. It also incorporates glass and conductive fibers in the PPS to strengthen the housing and more effectively dissipate electrostatic charges. The PROXPAC XL housing is rated for Type 4X and for IP66 environments and provides extra protection in severe environments.
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.
Thermal Power Generation Industry
Monitoring the radial vibration and axial displacement of the main shaft in large steam turbines to prevent rotor-to-stator contact.
Oil & Gas Upstream Exploration
Installed on the bearing housings of gas compressors on offshore drilling platforms to monitor bearing wear in humid, salt-spray environments.
Coal & Gas Chemical Industry
Used for Keyphasor speed and phase measurements on large reciprocating or centrifugal compressors in synthetic ammonia/methanol plants.
Nuclear Power Industry
Monitoring the bearing housing vibration of the main feedwater pump in the conventional island of nuclear power plants to ensure high reliability of the reactor cooling water circulation system.
Iron, Steel & Metallurgy Industry
Multi-bearing condition monitoring for blast furnace blowers, where the PPS housing effectively resists high-temperature radiation and dense dust in steel mills.
Hydropower Generation Industry
Installed on the large-diameter thrust bearings of hydro turbine generators to monitor axial thrust play and runout.
During operation, ensure the 3/4-14 NPT threads are precisely aligned and torqued to maintain the IP66 seal. Accurately adjust the 50mm penetration depth and the initial voltage gap to prevent probe-to-shaft contact. In hazardous locations, strictly adhere to explosion-proof wiring and grounding standards, and periodically inspect the housing O-rings to prevent ingress of bearing oil mist or external moisture.
330881-28-00-050-03-02 integrates an 8mm eddy current probe and a proximitor within an explosion-proof, anti-static, IP66/Type 4X PPS plastic housing, disruptively eliminating the intermediate extension cables required by conventional systems. Featuring a 50mm penetration depth and a 3/4-14 NPT thread, this model can be installed directly and safely onto the bearing housings of various large steam turbines, compressors, and other rotating machinery, delivering long-term, accurate, and low-maintenance asset condition monitoring and protection.
It is a Bently Nevada PROXPAC XL series proximity transducer assembly that integrates a 3300 XL 8mm probe, a Proximitor sensor, and a protective housing into a single unit to measure shaft vibration or axial position of large rotating machinery.
What is the working principle of 330881-28-00-050-03-02?
Uses eddy current principle to measure dynamic displacement.
What is the advantage of the 330881-28-00-050-03-02 integrated design?
Includes integrated Proximitor, removing extension cables, reducing installation costs and failure points.
What environment is 330881-28-00-050-03-02 suitable for?
IP66/Type 4X rated for harsh industrial environments.
What industries use 330881-28-00-050-03-02?
Power, O&G, and chemical industries for rotating machinery.
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