The invention relates to an autonomous mobile automatic device for soil irrigation which is supplied with water from a PET-like container having a capacity of 4...10 l and with electric power from the sun, meant to measure soil moisture and to maintain it at a preset value. According to the invention, the automatic device comprises an effector (1) supplied with energy from a solar cell (14) charging some secondary batteries in the box (13) and supplying a micro pump (31) at each command received from the moisture sensor (2), the said effector (1) being positioned on the water reservoir by means of a mounting device (11) provided with an opening (12) for the handle of the container, having a soil-moisture capacitive volumetric sensor (2) which is connected to the effector (1) by means of a cable (23) and a connector (24), where the sensor (2) may be programmed to measure the soil moisture or immersion depth, to transmit the information wirelessly and to optically signal the controlled moisture threshold using a LED, the moisture sensor (2) consisting of a humidity transducer (25) provided with a transparent handle (21) which contains the electronic system, a closing cap (24) and a trimmer (22) for adjusting the moisture threshold, and a micro pump system (3) including the micro pump (31) to be submerged into the container filled with water and supplied by a cable (32) from a connector (33) of the effector (1), the micro pump system (3) being connected to a water dripping system by means of an assembly (34) of transparent flexible hoses.Invenţia se referă la un automat mobil şi autonom, pentru irigarea solului, alimentat cu apă dintr-o butelie tip PET, cu capacitatea cuprinsă în intervalul 4...10 l şi cu energie electrică de la soare, ce măsoară umiditatea solului şi o menţine la o valoare prestabilită. Automatul conform invenţiei este constituit dintr-un element (1) de execuţie, alimentat cu energie de la o celulă (14) solară, care încarcă nişte acumulatori din cutie
