Piezoelectric Accelerometer

Miniature sensor offers high sensitivity vibration measurements.

Comments Off on Piezoelectric Accelerometer August 10, 2011
by Design Engineering Staff

Meggitt Sensing Systems introduced its Endevco model 2250A, a small, adhesive-mounted ISOTRON piezoelectric accelerometer with integral electronics, designed for vibration measurements of mini-structures and smaller objects. With a sensitivity of 10 mV/g, the accelerometer features high resonance frequency and wide bandwidth, with a lightweight (0.4 gm) design that effectively eliminates mass loading effects, the company says.

The accelerometer incorporates Meggitt’s Piezite type P-8 crystal element, operating in annular shear mode. It also incorporates an internal hybrid signal conditioner within a two-wire system which transmits its low-impedance voltage output through the same cable that supplies the constant current power. Signal ground is isolated from the mounting surface by a ceramic mounting base. A coaxial cable is supplied with the 2250A-10, as well as a tool to remove the accelerometer from its adhesive mounting surface.