The model 71 series piezo-resistive accelerometers employ a rugged, un-damped design for shock measurements from 6 kg to 60 kg and specify sensitivities from 3 to 30 mV/g. Their sensing system, machined from a piece of silicon, includes the inertial mass and strain gages arranged in an active, four-arm Wheatstone bridge paired with a zero-balance network. With resonant frequencies from 180 kHz to 700 kHz and zero damping, the component responds accurately to fast rise time, short-duration shock events. With a frequency response extending down to dc, it is also suitable for measuring long-duration transients. ENDEVCO, San Juan Capistrano, CA. (949) 493-8181.
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