By DE Editors
Meggitt Sensing Systems has introduced the Endevco model 71M series, a family of rugged, undamped subminiature surface mountable piezoresistive accelerometers designed to support a variety of high-g shock measurement requirements.
With available g ranges of 2K, 6K, 20K and 60K, the accelerometers feature 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. 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 low-profile, miniature, epoxy sealed subminiature surface mountable package, weighing just 0.06 gram, for minimized mass loading effects.
The low mass, small size and unique construction of the MEMS sensing element allows for high resonance frequency, low output impedance, 3x over-range, and zero damping for minimal phase shift over its useful frequency range.
The high resonance frequency of the units means they can survive in the presence of high-frequency components. Because they are undamped, the accelerometers can also accurately respond to fast rise times and short duration shock motion.
For more information, visit Meggitt Sensing Systems.
Sources: Press materials received from the company and additional information gleaned from the company’s website.