Piezoelectric accelerometer with integrated electronics
7257AT Meggitt Sensing Systems - Measurement Group

The Endevco® Model 7257AT is a small, hermetically sealed piezoelectric accelerometer with integral electronics, designed specifically for measuring vibration on flight test vehicles. This transducer offers the functions of a flight test accelerometer and an airborne charge amplifier in one small package. Its ±2.5V full scale output is biased at +2.5Vdc, which can be interfaced directly with many telemetry systems. There is also a built-in 4-pole Butterworth low-pass filter to provide the necessary out-of-band signal suppression.

The Model 7257AT features Endevco's Piezite® Type P-8 crystal element, operating in annular shear mode, which exhibits excellent output sensitivitystability over time. The transducer can be powered by any +15 to +32Vdc supply commonly found on most flight vehicles. The unit case is electrically isolated from the mounting surface. Its center through-hole mounting configuration allows 360° cable orientation flexibility. The first suffix after the model number indicates acceleration sensitivity in mV/g, the second suffix indicates the low-pass filter upper corner frequency.