Part number 330101-00-12-10-02-05 identifies the Bently Nevada 3300 XL 8 mm proximity probe. This is a standard threaded non-contact eddy current sensor manufactured by Bently Nevada, used to monitor radial vibration, axial thrust position, or rotational speed (critical phase) in industrial rotating machinery.
Based on the principle of high-frequency electromagnetic eddy currents, this probe, when used with a proximity sensor, outputs a high linear voltage signal of 7.87 V/mm (200 mV/mil) within a linear range of 2 mm (80 mil).
It is specifically designed for non-contact measurement of shaft vibration, static displacement (e.g., axial position), and critical phase velocity in hydrodynamic bearing units of rotating machinery such as steam turbines and compressors, and fully complies with API 670 International Petroleum Institute standard.






