Piezoelectric sensors measure the electrical potential caused by applying mechanical force to a piezoelectric material. Piezoelectric sensors are used in a variety of pressure-sensing applications. Alumina ceramics, single crystals, and ultrasonic transducers are few examples of piezoelectric materials. A piezoelectric sensor works on the principle of conversion of energy in mechanical and electrical energy forms. When a polarized crystal is put under pressure, some mechanical deformation takes place in the polarized crystal, which leads in the generation of the electric charge. The generated electric charge or the mechanical deformation can then be measured using a piezo sensor. There are many types of piezoelectric sensors. Examples include a piezoelectric accelerometer, piezoelectric force sensors, and piezoelectric pressure sensors. A piezoelectric accelerometer is widely used for OEM applications and is suitable for working at a lower power consumption and wider frequency range. Piezoelectric force sensors are low impedance voltage force sensors designed for generating analog voltage signals when a force is applied on the piezoelectric crystal and are widely used in machines for measuring force. A piezoelectric pressure sensor is also known as piezoelectric sensor pressure. Piezoelectric pressure sensors are used for measuring change in liquid and gases pressure. Other piezoelectric sensors are commonly available.