Meggitt Sensing Systems debuts high-g, triaxial, piezoresistive shock accelerometer

IRVINE, Calif., 14 Dec. 2013. Meggitt Sensing Systems, a Meggitt group division and maker of sensing and monitoring systems for extreme environments, has introduced the Endevco model 7284 series of lightly damped, high-g, triaxial, piezoresistive shock accelerometers well suited to high-g data recorders, weapons testing, missile fuzes, and other extreme-g applications.

The Endevco model 7284 series is, the triaxial version of the company’s single-axis 7280A series, shares the same footprint, bolt pattern, and highly survivable sensing system, while making high-g shock measurements across three mutually perpendicular axes. The rugged sensors, available in 20,000 g and 60,000 g ranges, offer superior survivability and low power consumption. With a frequency response extending down to dc (steady state), the model 7284 can measure long duration transient shocks.

Model 7284 incorporates three sensors mounted in a triaxial arrangement within a single housing. Each axis features a piezoresistive MEMS sensor with light gas damping to attenuate resonant amplitudes and prevent breakage in overload conditions. Units are only lightly damped; they accurately respond to fast rise times and short duration shock motion.

Screw-mount installation with factory-controlled and tested cross-axis performance makes the model 7284 much easier and more cost effective to install than three single-axis accelerometers with a mounting block, officials say. The sensor features an eight-conductor cable designed to withstand high-g shock acceleration inputs. Input voltage of 5V and cable length of 48 inches are standard, but both are easily configured to customer requirements.

All sensing elements are manufactured in-house at the Meggitt ISO9001-certified MEMS facility in Sunnyvale, Calif. Global sale of this product is subject to International Traffic in Arms Regulations (ITAR), and, as such, a license is required for all non-U.S. shipments, with the product also potentially subject to other restrictions on its sale and use. 

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