NB-IOT (Narrow Band Internet of Things) remote water meter

The utility model relates to a water meter, in particular to an NB-IOT (Narrow Band Internet of Things) remote water meter which comprises a base meter, a water inlet, a water outlet and a ball valve, and is technically characterized by further comprising a water meter shell and a lower cover placing plate buckled with the bottom of the water meter shell, and a driving motor is fixed on the upper surface of the lower cover placing plate; an electronic module box is fixed between the base meter and the inner wall of the water meter shell above the driving motor, a battery bin is arranged at the bottom of the electronic module box, and a sensor probe for detecting the concentration of calcium and magnesium ions is fixed to the position, between the base meter and the ball valve, of a water outlet of the base meter. An electronic module set connected with the sensor probe and the driving motor is arranged in the electronic module box, an output shaft of the driving motor is fixedly connected with the ball valve