The present invention relates to a fluid circulator (100) comprising a pump body (2) comprising an impeller (10) for movement of the fluid; a motor body (1) comprising an electric motor (7, 8, 9) for setting the impeller into rotation (10); a terminal box (3) associated to the motor body (1) and containing one electronic board (12) for the control of the circulator (100), the terminal box (3) comprising a cover element (14) for closing the terminal box (3). The electronic board (12) comprises a display (6) facing towards the cover element and suitable for displaying at least one operation indication of the circulator (100), the cover element (14) is being entirely made as a single piece of transparent material so as to permit viewing the display (6) from the outside of the terminal box (3).