The Bently Nevada 330903-17-19-05-02-00 is a 3300 XL series proximity probe, designed for precise radial vibration and axial position monitoring in industrial rotating machinery.
The Bently Nevada 330903-05-19-05-02-00 is a 3500/42M Proximitor Seismic Monitor. It processes input from both proximity and seismic transducers to monitor overall machinery vibration and position.