Bently Nevada 330171-00-20-10-02-00 Proximity Probe

The 330171-00-20-10-02-00 belongs to the 3300 5 mm series of eddy-current proximity probes. This compact sensor measures radial vibration and axial position on small steam turbines and compressors. Its 5 mm tip fits tight mounting spaces where larger probes cannot reach.

Technical Specifications

Measurement Principle and Interface

Eddy-current technology enables non-contact displacement measurement on ferrous targets. The driver sends a high-frequency signal through the coaxial cable to the probe coil. Subsequently, target movement modulates coil impedance and produces a proportional voltage output. The 330171-00-20-10-02-00 pairs with 3300 extension cables and Proximitor drivers for signal conditioning.

Installation and System Integration

Operators mount the probe through a threaded hole with a locknut. A minimum target size of 15 mm diameter ensures accurate linear response. Meanwhile, the 5 mm tip allows close spacing between measurement channels. This design reduces cross-talk in dense sensor arrays. The system also supports reverse-mount configurations for confined spaces.

Energy Storage and Power Considerations

The Proximitor driver draws power from a -24 Vdc rail, typically 12 mA maximum. No internal battery or capacitor stores energy in the probe itself. Instead, external modules handle signal demodulation and power regulation. Therefore, system designers must budget for a dedicated DC supply per channel.