Specific Application
Self-Contained Machine Casing Installations: Eliminates external intermediate extension cables and separate housings by integrating the Proximitor sensor directly into the weather-proof probe junction enclosure.
Severe Industrial Environments: Deployed on multi-stage pumps, cooling tower fans, or gas turbines where high humidity, hose-directed washdowns, or chemical exposure demands IP66 or Type 4X physical isolation.
Hazardous Area Vibration Monitoring: Intended for Zone 0/Zone 2 or Division 1/Division 2 environments where certified explosive atmosphere protection (ATEX/IECEx/cNRTLus) is mandatory.

• System Compatibility and Replacement Models
  System Compatibility:
  Bently Nevada 3300 XL 8 mm proximity probe system parameters
  Directly interfaces via 16 to 24 AWG field wiring to Bently Nevada machinery monitors up to 305 meters without standalone Proximitor blocks
  Standard machinery target surfaces calibrated to AISI 4140 steel target tracks
• Alternative Replacement Models:
  330880-28-00-020-03-02 (English/Imperial equivalent version with a standard 2.0-inch penetration length)
  330801-16-00-050-03-02 (Non-hazardous area / non-approved version of the metric assembly)
  Standalone 330106-05-30-10-02-05 probe paired with an independent 330180 Proximitor sensor and a 31000 housing assembly
• Differences from Alternative Models:
  Measurement Standards: The 330801 series utilizes metric configuration steps where the penetration is ordered in increments of 1 mm, while the 330880 series relies on English fractional options ordered in 0.1-inch increments.
  Agency Certification: The -28 option provides certified Multiple Approvals for explosive zones. The -16 alternative option contains identical mechanics but completely lacks dangerous environment ratings.
  System Footprint vs Traditional Setup: Compared to a separate probe, extension line, and detached Proximitor layout, the PROXPAC XL places all components inside a glass-reinforced PPS box. This eliminates cable signal losses across mid-way junctions, reduces mounting footprints, and cuts intermediate installation costs.

Ordering Information Table

Installation & Troubleshooting FAQ
Q1:What is the recommended gap voltage and mechanical adjustment tolerance for this assembly?
A1:The system has an 80 mils (2.0 mm) linear range with an incremental scale factor of 200 mV/mil (7.87 V/mm). The standard initial field calibration gap is Q2.1.27 mm (50 mils), which yields an output voltage of roughly -10.0 VDC. The threaded sleeve allows ±12.7 mm (0.5 in) adjustment from the mid-setting A2:distance to fine-tune the target distance before torquing the sleeve locknut to 39.3 N·m (350 in·lb).
Q3:Why does the system indicate diminished sensitivity or a highly non-linear calibration line?
A4:For shorter probe penetration selections between 25 mm and 50 mm, the nearby metallic casing walls can couple with the 8mm tip’s electromagnetic field, causing a Side View Effect. Counterbore may be required in the machine case to reduce probe side view or rear view effects if the spacing to the target housing walls is too tight.
Q4:What precautions must be taken to prevent moisture ingress into the integrated housing?
A4:While the molded glass-reinforced polyphenylene sulfide (PPS) housing is rated IP66/Type 4X against ambient moisture and hose spray, it cannot withstand sustained internal or external fluid pressure. Field engineers must ensure that sealing washers are in place on all unused conduit entries, blanking plugs are tight, and appropriate conduit seals are utilized to block moisture or machine lube oil from migrating through external piping into the terminal housing.

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