Product Overview

The Bently Nevada 330880-RU-50-028-03-02 is a specialized PROXPAC XL proximity transducer assembly designed for the high-precision monitoring of shaft vibration and axial position. Part of the 3300 XL series, this integrated housing and probe system is engineered to provide reliable data for Turbine Supervisory Instrumentation (TSI). The assembly utilizes an eddy current measurement principle to track the movement of critical rotating components without physical contact. By combining a robust 3300 XL probe with a durable, externally adjustable housing, it allows for seamless maintenance and gap calibration even while the machinery is operational.

Key Technical Characteristics and Hardware Parameters

This PROXPAC XL configuration is built to endure the thermal and chemical stresses found in heavy industrial environments, featuring a hermetically sealed design and chemical-resistant materials.

• Model Identification 330880-RU-50-028-03-02

• Probe Tip Material Polyphenylene Sulfide (PPS) for high dielectric strength and corrosion resistance

• Probe Tip Diameter 8 mm (Standard 3300 XL)

• Mounting Thread 3/4-14 NPT principal mounting interface

• Housing Material Glass-reinforced PPS with stainless steel components

• Maximum Probe Length 5.0 inches (Option -50)

• Agency Approvals Multiple hazardous area certifications (Option -03)

• Installation Hardware Includes one 3/4-14 NPT fitting, a 3/4-14 to 1/2-14 NPT stainless steel reducer, and two plugs

• Mechanical Stability Retaining nut rated for 29.5 N·m (260 in·lb) of torque to prevent drift

• Environmental Rating Designed for IP66 / NEMA 4X compliance in sealed configurations

Industrial Applications and Operational Benefits

The 330880-RU-50-028-03-02 is an essential tool for maintenance engineers who require "live" access to vibration sensors. Its primary role is to ensure the continuous health of rotating assets in the following sectors:

• Power Generation Monitoring radial vibration and thrust position in steam and gas turbines to prevent catastrophic rotor-to-stator contact.

• Oil and Gas Processing Tracking shaft movement in high-speed centrifugal compressors and expanders.

• Chemical Manufacturing Providing reliable vibration data for large process pumps and agitators operating in corrosive atmospheres.

• Predictive Maintenance Enabling technicians to perform gap adjustments and probe replacements without decommissioning the machine casing, significantly reducing downtime.