Piezoelectric sensor

• A piezoelectric sensor is a device that uses the piezoelectric effect to measure pressure, acceleration, strain or force by converting them to an electrical signal. 
• Based on piezoelectric technology varous physical quantities can be measured; 
• The most common are pressure and acceleration. When the accelerometer experiences a motion, the invariant seismic mass loads the elements according to Newton’s second law of motion F = ma.
• Vibration sensors can also be used to harvest otherwise wasted energy from mechanical vibrations.