Bently Nevada accelerometers are high-precision piezoelectric sensors engineered for machinery health monitoring, specifically designed to detect high-frequency vibration and casing-mount seismic activity. Unlike standard proximity probes, these sensors excel in monitoring rolling-element bearings, gearboxes, and aerodynamic flow instabilities in gas turbines and centrifugal compressors. The series features robust stainless-steel housing with hermetic sealing, ensuring reliable performance in extreme temperatures and hazardous industrial environments. Technical advantages include high signal-to-noise ratios, wide frequency response ranges, and compatibility with the 3500/42M and 2300 vibration monitors. Whether utilizing the 330400 external-charge series for high-temperature applications or the 200350 integrated-circuit piezoelectric (IEPE) sensors for general-purpose casing vibration, these accelerometers provide the critical data required for early fault detection and predictive maintenance strategies in heavy-duty rotating machinery.