Bently Nevada 330851-02-000-60-10-00-05 3300 XL 25 mm Proximity Probe

The Bently Nevada 330851-02-000-60-10-00-05 serves as a high-precision transducer for large-scale rotating equipment. This 25 mm probe primarily tracks the differential expansion between turbine rotors and stators. Because thermal growth occurs at different rates, this measurement prevents mechanical interference. The sensor operates reliably across a temperature spectrum from -35°C to +200°C. Therefore, it remains a standard choice for high-heat steam turbine environments.

Mechanical Configuration and Design

This specific model features a robust M30 x 2 metric thread for heavy-duty mounting. The probe body includes a 60 mm unthreaded section followed by a 100 mm total case length. Additionally, an integrated 1.0-meter cable provides the initial connection to the transducer system. This version omits external armor to ensure maximum flexibility in tight installation paths. The rugged build quality supports long-term deployment in demanding industrial settings without signal degradation.

Measurement Accuracy and Signal Output

Precision remains the core advantage of the 3300 XL 25 mm series. The system provides an expansive linear range of 12.7 mm for broad movement tracking. It delivers a calibrated sensitivity of 0.787 V/mm, which translates to 20 mV/mil. Consequently, the monitor receives highly detailed data regarding rotor position changes. This allows operators to identify potential clearance issues before they lead to catastrophic machine failure.

Industrial Compatibility

This probe integrates seamlessly with the 3300 XL 25 mm Proximitor and extension cables. It specifically supports mid-sized to large steam turbine generators in power production facilities. Furthermore, its compliance with API 670 standards ensures interchangeability with other certified components. The hardware facilitates predictive maintenance by providing stable, repeatable measurements over years of service. Its lightweight 0.08 kg design simplifies the installation process for field technicians.

Technical Specification Table