Model 578A is an IEPE light-weight accelerometer permitting simultaneous shock and vibration measurements. 578A features an annular shear ceramic crystal which exhibits excellent output stability over time. The accelerometer incorporates an internal circuit in a twowire IEPE system which transmits its low impedance voltage output through the same cable that supplies the constant current power. Signal ground is connected to the outer case of the unit. Isolated mounting screw or washer are available. Polarity inversion protection for the amplify circuit is inherent in the circuit design. The welded Titanium Alloy construction provides a lightweight hermetic housing. The miniature M3 glass insulated connector provides longterm stability over the operating temperature range. In addition to adhesive mounting, 578A has a through holes for screw mounting on the test object. The cable outgoing direction can be discretional for install convenience. 578A provides wide frequency response, which is ideal for dynamic vibration and shock measurement especially for lightweight structures and drop testing for the packaging industry. Senther’s model 12-L is a M3 to BNC breakout cable for the sensor.