Water tank / pump remote control system via GSM.

It is a set of two GSM devices that communicate with each other, for the purpose of automatically filling a tank from a remote pumping station. It can work for any distance, regardless of whether or not there is line of sight. The system automatically turns the pump station on and off based on the tank level, without causing a communication charge to either device. In addition, the tank panel can send SMS alerts for overflow or emptying. The system has unlimited range (it works where there is mobile phone coverage). It consists of a watertight panel in the tank (MT820) and a set of two socketed devices in the pump station (MT812-MT811). Both devices need one SIM card each to activate. The only programming required is done with an SMS message to each device stating the contact number of its pair. The system is also available as MT820DSET with the possibility of controlling two pumps from the same tank.