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The 330881-00-04-150-06-02 belongs to Bently Nevada's PROXPAC XL series of integrated non-contact eddy current displacement transducer assemblies. It integrates both the proximity probe and the Proximitor sensor within a single field protection enclosure, primarily used for shaft vibration and axial displacement monitoring in large rotating machinery such as steam turbines, compressors, and fans.
The housing body replaces steel or aluminum with advanced glass- and conductive-fiber-infused PPS thermoplastic
This assembly integrates the proximitor directly inside the housing cover, eliminating the extension cable required in traditional systems
The built-in 3300 XL 8mm system supports full probe and proximitor interchangeability, eliminating bench recalibration
The PROXPAC XL transducer assembly features an external configuration identical to the 31000 and 32000 proximity probe housing assemblies, retaining the same mechanism for external probe access and gap adjustment. The primary evolution of this assembly is that its housing cover directly incorporates its own 3300 XL Proximitor sensor internally.
This setup renders the PROXPAC XL a completely self-contained proximity probe system, eliminating the extension cable traditionally required between a probe and its associated Proximitor sensor. It also dispenses with the need for a separate Proximitor enclosure, allowing field wiring to connect directly from the monitors to the assembly terminals.
The 330881-00-04-150-06-02 features an assembly housing body that replaces the steel and aluminum used in previous product lines with Polyphenylene Sulfide (PPS), an advanced molded thermoplastic. It incorporates glass and conductive fibers within the PPS material to increase structural strength and more effectively dissipate electrostatic charges.
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.
Petroleum Refining
Installed on catalytic cracking rich gas compressors and crude distillation tower bottom pumps; its polyphenylene sulfide housing enables direct shaft vibration monitoring in areas full of highly corrosive hydrogen sulfide gas, eliminating external cable enclosures.
Ethylene & Petrochemical Industry
Used for axial thrust displacement monitoring on large ethylene charge gas compressors and propylene compressors; its integrated explosion-proof setup handles hazardous hydrocarbon gas environments directly to secure core rotor operations.
Coal Chemical Industry
Applied to large centrifugal compressors and high-pressure coal slurry pumps in air separation units, utilizing its Type 4X insulated enclosure to resist coal dust, moisture, and electromagnetic interference while capturing micron-level axial and radial movements.
Thermal Power Generation
Deployed on the fluid-film bearings of steam turbine induced draft fans, forced draft fans, and boiler feedwater pumps for non-contact radial vibration measurement; the extension-cable-free setup reduces high thermal radiation interference around dense cabinets.
Metallurgical and Iron & Steel Industry
Installed on blast furnace blowers and converter gas recovery fan trains, providing high-precision shaft condition monitoring for bearing housings within extreme environments filled with metallic dust and high heat accumulation.
The 330881-00-04-150-06-02 requires special attention during use because its proximitor is built directly inside the cover, meaning field wiring must be routed directly into the housing terminals, ensuring tight wire connections and a complete enclosure seal to maintain its Type 4X and IP66 moisture and corrosion resistance.
When rotating the external sleeve to adjust the static gap voltage to approximately minus 10 volts DC, movements must be smooth to avoid damaging the internal 15-inch-long positioning sleeve.
Additionally, since the polyphenylene sulfide housing contains integrated conductive fibers, the enclosure grounding system must be verified as continuous during installation to dissipate electrostatic charges properly and eliminate signal interference caused by static accumulation.
330881-00-04-150-06-02 is a PROXPAC XL Proximity Transducer.
How does the 330881-00-04-150-06-02 work?
It operates on the eddy current principle. The probe tip emits a high-frequency electromagnetic field. When a conductive metallic target approaches, eddy currents are generated, causing the system to output a voltage signal directly proportional to the gap distance between the probe tip and the metal surface.
How do you use a product like the 330881-00-04-150-06-02?
You need to mount the probe perpendicularly through the machine bearing housing or casing, aligning the tip with the observed shaft. Then, connect it to a 3300 XL 11 mm Proximitor Sensor via an extension cable, and route the Proximitor's output signal to a monitoring system, such as the Bently Nevada 3500, for data analysis.
What are the primary applications of the 330881-00-04-150-06-02?
It specializes in measuring axial thrust position (displacement), radial vibration, and Keyphasor speed/timing references on large rotating machinery such as steam turbines, compressors, and generators.
Is the 330881-00-04-150-06-02 hazardous area rated?
No, this specific part number is not hazardous area rated.
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