A sensor is a component or device that converts an external input signal to an electrical signal. As a tool of information acquisition, it occupies an important position in the measurement and control type intelligent power meter. Sensors can convert the energy format of information. It usually converts other energy forms into electrical forms and processes them. Sensor output is always an electrical signal. This is primarily for amplification, feedback, filtering, integration, differentiation, storage and long range transmission of electrical signals.<br>
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