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Piezoelectric Accelerometer Combines Sensor and Amplifier

By Design World Staff | June 17, 2010

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The Endevco® model 7257AT is a compact, hermetically sealed piezoelectric accelerometer with integral electronics for vibration measurements on flight test vehicles, particularly ones that incorporate telemetry as their chosen data acquisition system. The distinguishing feature of this accelerometer is that it offers the functions of both flight test accelerometer and airborne amplifier in one small package.

Meggitt-Endevco-model-7257AT-accelerometer

Available in six model variations, with choice of 10 mV/g or 100 mV/g sensitivity and upper corner frequency ranges from 500 to 5000 Hz, the Endevco® model 7257AT offers a ±2.5 V full scale output, biased at +2.5 Vdc, which can directly interface with many types of telemetry systems.  The sensor’s three-wire configuration offers fixed voltage input, with a built-in four-pole Butterworth low-pass filter for necessary out-of-band signal suppression, typically required for telemetry-based applications.  In addition, the sensors can be powered by any flight vehicle standard +15 to +32 Vdc supply, and are electrically case isolated from the mounting surface. A center through-hole mounting configuration allows for 360° cable orientation and greater application flexibility. ?A recommended accessory for use with the model 7257AT is the Endevco® model 6917M2-XXX, a directly compatible cable terminating with pigtails.

Meggitt Sensing Systems
www.endevco.com

::Design World::


Filed Under: Aerospace + defense, Sensors (position + other), Shocks + vibration control • gas springs, Test + measurement • test equipment

 

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