By DE Editors
Meggitt Sensing Systems has introduced the Endevco model 71M series, a family of undamped subminiature surface mountable piezoresistive accelerometers that are designed to support a variety of high-g shock measurement requirements. With available g ranges of 2K, 6K, 20K and 60K, design of the 71M series features a patented, monolithic, four-active arm bridge circuit design incorporating the use of Meggitt s own proprietary sensing element, machined in-house from a single piece of silicon at its ISO9001 certified MEMS facility.
This etched silicon chip includes both the inertial mass and strain gages arranged in an active four-arm Wheatstone bridge circuit, complete with an on-chip zero balance network. The element is housed within a miniature, epoxy sealed subminiature surface mountable package, weighing just 0.06 gram.
According to the company, the low mass, small size and distinct construction of the MEMS sensing element allows for high resonance frequency, low output impedance, 3 times over-range, and zero damping for minimal phase shift over its useful frequency range.
Because they are undamped, the accelerometers can also respond to fast rise times and short duration shock motion, according to the company. With a frequency response extending down to dc (steady state), they are intended for measuring long duration transient shocks while integrating acceleration data for velocity and displacement.
For more information, visit Meggitt Sensing Systems.
Sources: Press materials received from the company and additional information gleaned from the company’s website.