Shock accelerometers

PCB Series 3991/3501 MEMS shock accelerometers are miniature, high-amplitude, DC response acceleration sensors, capable of measuring long-duration transient motion, as well as responding to and surviving extremely fast rise times typical of high-g shock events. Offered in packaged and OEM configurations, these sensors are able to fulfil a variety of installation requirements.

The air-damped acceleration sensing element, which is micro-machined from silicon, is manufactured with the latest advances in etching techniques and equipment. Measuring just 2.5 x 1.7 x 0.9 mm, the sensor incorporates a seismic mass, protective over-range stops and a full-active, piezoresistive Wheatstone bridge.

The slight air-damping reduces the resonant amplification which increases measurement accuracy. The over-range stops give the sensor good survivability.