The sensing element contained within this shock accelerometer series features a unique, shear mode four quartz crystal configuration combined with an annular preload sleeve and seismic mass. The element design provides over 100 kHz resonance frequency ensuring accurate measurement of high speed events with zero shift and internal amplifier saturation virtually eliminated. These shock sensors exhibit insensitivity to thermal transients, and have extremely low transverse and base strain sensitivity. Using quartz as the sensing material adds another performance benefit in that quartz will not depolarize if exposed to high shock.
Poor connector pin continuity resulting from an applied shock can momentarily interrupt a measured event. To ensure reliable shock measurements, Type 8742A... accelerometer contains an improved spring insert made of a gold plated Beryllium-Copper. Beryllium Copper provides the elastic physical properties that promote positive contact and resists aging.