Fecha de publicación: 27/10/2020 Fuente: Wipo "IOT" The utility model belongs to the technical field of water meters, and particularly relates to an NB-IOT valve control photoelectric direct reading water meter. The utility model discloses an NB-IOT valve control photoelectric direct-reading water meter. The water meter comprises a water meter body and is characterized by further comprising a built-in antenna and a control circuit in the water meter body, the control circuit is composed of a main control unit, an NB-IOT wireless receiving and transmitting module, a valve driving circuit, an infrared photoelectric array circuit, a power supply unit and an RS485 interface circuit, and the built-in antenna is connected with the NB-IOT wireless receiving and transmitting module; the NB-IOT transceiver circuit, the photoelectric direct-reading circuit and the valve control circuit are integrated into a whole, and the built-in antenna is small in size and power-saving.