SUCTION TUBE, UREA SENSOR WITH A SUCTION TUBE AND SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM WITH A UREA SENSOR AND A SUCTION MECHANISM AND SUCTION TUBE
The invention relates to a suction tube for a urea sensor for installation in a urea tank that is used for drawing urea solution from the urea tank with a suction pipe and a suction opening. The suction tube (101) has a suction pipe (104) with a suction opening (106), characterized in that the suction pipe (104) has at least one hole (108) that is covered on the outside by a cover (110) such that when there is an underpressure in the suction pipe (104) compared to in the tank (102), the cover (110) will lock against the suction pipe (104) and seal the hole (108), while with an overpressure inside the suction pipe (104) compared to the tank (102), the cover (110) deforms to allow excess urea solution to escape through the hole (108) from the suction pipe (104).
