PURPOSE: An electronic water meter using optical sensor is provided to prevent measuring loss due to the control of a meter, thereby maximizing efficiency.;CONSTITUTION: An electronic water meter comprises an optical sensor(10), an impeller(20), a central control unit(30), a memory(40), an LCD display part(50) and a communication device(60). The optical sensor comprises a light-emitting area and a light-receiving area. In the surface of the impeller, an un-reflective plate and a reflective plate are formed to be rotated according to the flux of the water meter. The central control unit detects flux according to the rotation number of the impeller detected from the optical sensor. The memory saves various information treated in the central control unit. The LCD display part displays time-based accumulated quantity, used flux before and after, and the state of communication which are calculated in the central control unit. The communication device transfers the calculated flux information through wireless or wire communications.;COPYRIGHT KIPO 2012
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