Bently Nevada 330878-50-05 3300 XL 50mm Proximity Probe System

The Bently Nevada 330878-50-05 is a high-performance 50mm proximity probe system designed for critical machinery protection and monitoring. As part of the renowned 3300 XL series, this transducer system is engineered to provide accurate, reliable measurements of differential expansion and case expansion in large rotating machinery .

What is the Bently Nevada 330878-50-05?

This specific part number refers to a 3300 XL 50mm system with a 5.0-meter system length. It is specifically designed to monitor differential expansion in large steam and gas turbine generators . Unlike standard 5mm or 8mm probes used for vibration, the 50mm probe has a longer linear range, making it ideal for measuring the large mechanical movements found in heavy-duty turbines.

Key Features and Benefits

Precise Differential Expansion Monitoring: The 50mm probe size provides an extended measurement range, allowing it to accurately track the expansion differential between the rotor and the casing. This is critical for preventing dangerous internal rubs during turbine startup and coast-down.

"System" Design for Accuracy: Like all Bently Nevada 3300 XL systems, the 330878-50-05 includes a matched probe, extension cable (if applicable), and proximity driver. This "system" approach ensures optimal linearity and temperature stability.

Robust Construction: Designed to withstand harsh industrial environments, the probe offers excellent mechanical stability and reliability.

RFI/EMI Immunity: The 3300 XL series features improved resistance to electromagnetic and radio frequency interference, ensuring signal integrity even in electrically noisy environments .

Technical Specifications

Model Number: 330878-50-05

Series: 3300 XL

Probe Size: 50mm

System Length: 5.0 meters (probe and extension cable combined)

Common Applications: Differential expansion (thrust position), case expansion .

Compatible Monitors: Designed to interface with Bently Nevada monitoring systems such as the 3500/40, 3500/42M, and 3500/50 modules .

Applications

The Bently Nevada 330878-50-05 is essential for maintaining the reliability of your critical assets. It is widely used in:

Large Steam Turbine Generators

Heavy-Duty Gas Turbines

Hydroelectric Turbines

Industrial Compressors requiring case expansion monitoring