The security system for filling a tank (1) from a tank vehicle (2) object of the invention comprises a connection installation of the tank vehicle (2) with the tank (1) comprising a pipe (3) that joins a connecting mouth (4) with the reservoir (1), and a level sensor (5) located in the reservoir (1) that emits a first signal (6) to a console (8). In the system object of the invention, the connection installation comprises a post (9), such that the post (9) incorporates sound and light means (10), and the console (8) comprises an emitter (11) which, when receives the first signal (6), emits a second signal (7) that is received by a receiver (12), so that the receiver (12) activates the sound and light means (10) to alert an operator that interrupts the filling the tank (1). (Machine-translation by Google Translate, not legally binding)
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