Product Overview

The Bently Nevada 330881-28-04-145-06-02 is an all-in-one PROXPAC XL transducer assembly designed to provide a robust, self-contained solution for proximity probe installations. This system integrates the 3300 XL 8 mm proximity probe, extension cable, and Proximitor sensor into a single environmental housing. By consolidating these components into a weather-resistant enclosure, the PROXPAC XL eliminates the need for external proximitor mounting and protects critical connection points from moisture, oil, and mechanical damage. It is engineered for the precise measurement of radial vibration, shaft position, and axial thrust in large-scale rotating machinery where external probe mounting is required.

Key Technical Characteristics and Hardware Parameters

This PROXPAC XL configuration is specifically tailored for deep-penetration applications in hazardous or corrosive industrial zones, utilizing advanced 3300 XL eddy current technology.

• Model Number 330881-28-04-145-06-02

• Probe Type 3300 XL 8 mm Proximity Transducer

• Standoff Length 28 mm (Option -28)

• Probe Penetration Length 145 mm (Option -145)

• Total System Length 9.0 Meters (Option -04)

• Mounting Thread 3/4-14 NPT with stainless steel reducer (Option -06)

• Hazardous Area Approvals ATEX/IECEx/CSA multi-certification (Option -02)

• Enclosure Material Polyphenylene sulfide (PPS) and Stainless Steel/Aluminum base

• Linear Range 2.0 mm (80 mils)

• Scale Factor 7.87 V/mm (200 mV/mil)

• Operating Temperature -51°C to +177°C (-60°F to +351°F) for the probe tip

• Environmental Protection IP66 / NEMA 4X (Hermetically sealed probe)

Industrial Applications and Operational Use Cases

The 330881-28-04-145-06-02 assembly is an essential component of Turbine Supervisory Instrumentation (TSI), particularly for assets where the sensor must be mounted on the exterior of the machine casing.

• Steam and Gas Turbine Monitoring Measuring absolute shaft vibration and axial position to prevent rotor-to-stator contact during thermal transitions.

• Large Centrifugal Compressors Tracking axial displacement and radial shaft orbits to detect unbalance or aerodynamic surge conditions.

• Hydroelectric Generators Providing stable displacement data for vertical shafts where long-term moisture resistance is mandatory.

• Boiler Feed Pumps Monitoring shaft integrity in high-temperature, high-vibration power plant environments.

• Hazardous Zone Deployment Utilizing the explosion-proof 3/4-14 NPT interface and global certifications for safe operation in oil refineries and chemical processing plants.