Model 394A is a tri-axial accelerometer for lowfrequency micro-g vibration measurement. Thismodel is specifically designed for largeconstruction, precision equipment vibrationisolation and seismic monitoring applications todetect signals of ultra-low frequency vibrations. Theaccelerometer incorporates an internal circuit within a two-wire IEPE system which transmits its lowimpedance voltage output through the same cablethat supplies the constant current power. Signalground is internal shielded and isolated from themounting base of the unit, thus guaranteeingexcellent repeatability and long-term stability. Thewelded stainless-steel construction provides ahermetic housing. 394A offer Ø4.3 corner thron ww