The Bently Nevada 330881-28-06-155-03-02 is a high-performance ProxPac XL Proximity Transducer Assembly designed for industrial vibration and position monitoring. This self-contained system integrates a 3300 XL 8 mm proximity probe and a 3300 XL Proximitor sensor into a single, robust housing, eliminating the need for external extension cables and separate sensor enclosures.

Features

• Integrated 3300 XL 8 mm proximity probe and Proximitor sensor system.
• Self-contained design simplifies installation and reduces field wiring complexity.
• Constructed with AISI 304 stainless steel and durable PPS housing for harsh environments.
• Threaded sleeve design allows for precise probe gap adjustment of +/- 12.7 mm.
• Compatible with standard 3/4-14 NPT machine case mounting.
• Includes M20 fitting and two plugs for versatile connectivity.

Applications

• Radial vibration and axial position monitoring for steam and gas turbines.
• Predictive maintenance for centrifugal compressors in space-constrained installations.
• General machinery protection for pumps, large motors, and fans.
• Monitoring in high-heat or harsh industrial environments such as steel and metal mills.

Technical Specifications

Installation Guidelines

• Ensure the assembly is mounted through the machine case using the 3/4-14 NPT thread.
• For assemblies where the combined B and C dimensions exceed 305 mm (12.0 in), additional sleeve support is required to prevent resonance.
• Maintain a nominal probe tip gap of 1.27 mm (0.050 in) from the target surface during initial setup.
• The installation must maintain at least an IP54 protection rating to ensure sensor integrity.
• Always power down the monitoring system before performing any wiring changes or maintenance on the transducer assembly.
• Handle with care to avoid damage to the probe tip; ensure the assembly is properly grounded according to site safety standards.

FAQ

What is the primary function of the 330881-28-06-155-03-02?

This unit is a fully integrated proximity transducer assembly used to measure shaft vibration and position on rotating machinery, combining the probe and sensor into one unit to streamline installation.

What is the typical operating gap voltage?

For 3300 XL series probes, the normal operating gap voltage is generally maintained between -9 V and -11 V DC.

Does this assembly require an external extension cable?

No, the ProxPac XL design integrates the Proximitor sensor directly into the housing, removing the need for an extension cable between the probe and the sensor.