A MEMS DC accelerometer provides several benefits when compared to the piezoelectric and piezoresistive technologies used in many of today’s accelerometers.

There is no lower frequency limit to the sensor’s measurement range.  Piezoelectric type accelerometers require a dynamic input of some minimum frequency to generate a response, and below this threshold the signal deteriorates.  SDI’s variable capacitance sensing technology allows for response to DC accelerations as well as dynamic vibration.  Because it is powered, the sensor doesn’t require any movement to provide a useful signal – it will always report back with the capacitance between those wings and the plates below, even when there’s no movement at all.