Meggitt Sensing Systems, a Meggitt group division, 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.
- Available g ranges of 2K, 6K, 20K and 60K
- Features a patented, monolithic, four-active arm bridge circuit design (U.S. patent numbers 4,498, 229, 4,605,919 and 4,689,600)
- Incorporates the use of proprietary sensing element, machined in-house from a single piece of silicon
- Etched silicon chip includes both inertial mass and strain gages arranged in active four-arm Wheatstone bridge circuit with on-chip zero balance network
- Housed within low-profile, miniature, epoxy sealed subminiature surface mountable package
- Weighs 0.06 grams, for minimized mass loading effects
- Low mass, small size and unique construction allows for high resonance frequency, low output impedance, 3x over-range, and zero damping for minimal phase shift
- High resonance frequency permits survival in presence of high-frequency components, in a shock pulse that could otherwise shatter system with lower resonance frequencies
- Accurately responds to fast rise times and short duration shock motion because undamped
- Frequency response extends down to dc (steady state)
- Well suited for measuring long duration transient shocks while integrating critical acceleration data for velocity and displacement
- Accessories include model 126 three-channel DC bridge amplifier, model 136 three-channel signal conditioner, and model 436 DC differential voltage amplifier
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