The Bently Nevada 330881-16-04-138-03-02 is a PROXPAC XL Proximity Transducer system. Unlike traditional proximity systems that utilize separate components, the PROXPAC XL integrates the probe, extension cable, and Proximitor sensor into a single, self-contained unit. This design simplifies installation and reduces the number of connection points in vibration monitoring applications.

Features

• Integrated system design combining probe, extension cable, and Proximitor sensor
• Housing constructed from Polyphenylene Sulfide (PPS), a molded thermoplastic reinforced with glass and conductive fibers for electrostatic dissipation
• Rated for Type 4X and IP66 environments, providing protection in severe industrial conditions
• 8 mm 3300 XL probe technology
• Configured with 40 mm standoff adapter and 138 mm probe penetration
• Includes one M20 fitting and two plugs
• Mounting thread: 3/4-14 NPT

Applications

This transducer is designed for continuous monitoring and protection of critical rotating machinery, including:

• Steam and gas turbines in power generation
• Large centrifugal, axial, and process gas compressors
• Critical boiler feed pumps and high-pressure process pumps
• Large electric motors and industrial generators
• Heavy-duty industrial gearboxes requiring precise shaft alignment monitoring

Technical Specifications

Installation Guidelines

• Gapping: For optimal performance, gap the probe at the center of its linear range. For this 8 mm system, the target gap is typically 1.27 mm (50 mils), corresponding to an output of approximately -10 VDC.
• Cross-Talk Prevention: Maintain a minimum separation between transducer tips of at least 40 mm (1.6 in) for axial measurements or 38 mm (1.5 in) for radial vibration to prevent signal interference.
• Handling: Ensure the system is powered down before performing any wiring or maintenance. Handle with care to avoid damage to the probe tip or cable insulation.
• Environment: Ensure the mounting location is free from excessive mechanical shock and that the housing is properly sealed using the provided fittings to maintain the IP66 rating.

FAQ

What is the primary function of the PROXPAC XL?

It is designed for real-time, high-precision monitoring of vibration and position in rotating machinery, ensuring safe operation through continuous condition monitoring.

What is the working principle of this transducer?

The transducer operates on the principle of electromagnetic induction to measure shaft displacement and vibration without physical contact.

Is this part still available?

The 330881-16-04-138-03-02 may be available for purchase and support even if it has reached End-Of-Life (EOL) status from the original manufacturer.