Bently Nevada 330851-02-000-060-10-00-CN 3300 XL 25 mm Proximity Probe

Bently Nevada 330851-02-000-060-10-00-CN 3300 XL 25 mm Proximity Probe

The Bently Nevada 330851-02-000-060-10-00-CN, also cataloged as the 330851 25 mm Proximity Probe, operates as a dedicated hardware component for measuring differential expansion (DE) within mid-size to large steam turbine generators. It functions as part of the 3300 XL 25 mm Transducer System, converting the relative axial displacement between the machine stator and the turbine rotor into a proportional voltage signal.

Hardware Specifications

Proximity Transducer Mechanical Monitoring Attributes

The 3300 XL 25 mm system requires precise calibration tracking over its extended 12.7 mm linear range to record thermal expansion vectors. When deploying multiple units to observe a shaft collar or ramp target, correct orientation prevents cross-talk suppression failures and cross-channel tracking anomalies. Maintaining accurate spatial gaps ensures that rotor dynamics and differential growth do not drift beyond the calibrated limits of the eddy-current probe scaling matrix.

Frequently Asked Questions

Q: What is the primary industrial application for this specific 25 mm probe configuration?

A: This extended-range hardware is designed for differential expansion tracking on steam turbine generators to measure growth differentials between the rotor and casing.

Q: Can this probe be configured in a redundant pairing layout on a single target?

A: Yes. The system supports multiple mounting arrangements, including dual probes observing the same side of a collar for redundancy, or complementary layouts on opposite sides to extend total range.

Field Installation Guidelines

Mount the M30x2 threaded casing directly through the designated bracket, ensuring the 0 mm unthreaded portion clears internal structural obstructions. Rotate the probe body into the target zone while tracking the output voltage until the target gap voltage aligns with the specified center point of the 12.7 mm linear range. Secure the locking mechanism to prevent movement caused by severe casing thermal shifts, and run the stainless steel armored cable through rigid conduit paths to eliminate field mechanical damage.