Processing of physical data starts with capturingthis data. Sensors can be designed for virtually every physical and chemical quantity, including
–weight, velocity, acceleration, electrical current,voltage, temperatures, and
–chemical compounds.
•Many physical effects used for constructing sensors.
•Examples:
–law of induction (generat. of voltages in a magnetic field),
–light-electric effects.
•Huge amount of sensors designed in recent years.