Reliability: This accounts to the sensors ability to keep characteristics in certain limits under set operational conditions.īesides these, some of the specifications of piezoelectric sensors are a threshold of reaction, errors, time of indication etc….

Sensitivity S: Ratio of change in output signal ∆y to the signal that caused the change ∆x.

The range of measurement: This range is subject to measurement limits.

Some of the basic characteristics of piezoelectric sensors are

Piezoelectric Sensor Piezoelectric Sensor Specifications Sensors are also known as primary transducers. A sensor can be called a pressure transducer in an electrical signal. For the proper response of the sensor, the load and leakage resistance must be large enough so that low frequencies are preserved.

The capacitance Ce is inversely proportional to the elasticity of the sensor material. The inductance is due to the inertia of the sensor. The resistance Ri is the internal resistance or insulator resistance. Piezoelectric Sensor CircuitĪ piezoelectric sensor internal circuit is given above. The piezoelectric material generates charge used for calibration of motion.Īn acceleration compensation element is used along with a pressure sensor as these sensors can pick up unwanted vibrations and show false readings. When motion is applied, seismic mass load’s the piezoelectric material according to Newton’s second law of motion. In accelerometers, seismic mass is attached to the crystal element to transfer the applied force to piezoelectric materials. The produced voltage is proportional to the amount of pressure applied. Upon application of pressure on this thin membrane, the piezoelectric material gets loaded and starts generating electrical voltages. In the pressure sensor, a thin membrane is placed on a massive base to transfer the applied force to the piezoelectric element.

Piezo vibration sensor