The compact Endevco model 73 triaxial piezoresistive shock accelerometer from Meggitt Sensing Systems was designed to provide measurements in three orthogonal directions within a footprint of less than 0.2 in2 (5.1 mm2). Model 73 is suitable for applications such as high-shock data recorders, missile fuzing, and weapon systems. The design incorporates three high-g piezoresistive shock accelerometers housed on a mounting block. Units are available in 2000, 6000, 20,000, and 60,000 g ranges with frequency response capabilities down to steady-state dc for the support of long duration transient measurements. Model 73 accelerometers offer minimal zero shift after shock and are undamped for broad frequency content. A compact size allows high resonance frequencies and improved bandwidth with repeatable responses to rise times and shock motion.