Patent ID: 7669472
Filing Date: 2010-03-02
Classification: G01F

Abstract:
1. A liquid level detector for detecting a liquid level of a liquid stored in a tank, comprising: a liquid guiding pipe connected to the tank and guiding the liquid in the tank in such a manner that a liquid level of the guided liquid conforms to a liquid level of the liquid in the tank; a branching liquid guiding pipe for detecting a liquid level, the branching liquid guiding pipe branching off from the liquid guiding pipe and guiding the liquid in such a manner that a liquid level of the guided liquid conforms to a liquid level of the liquid in the tank; a discharge pipe, connected to the liquid guiding pipe below where the branching liquid guiding pipe branches from the liquid guiding pipe, for discharging liquid from the liquid guiding pipe and the branching liquid guiding pipe; a position sensor for detecting a liquid level of the liquid in the branching liquid guiding pipe; and a bubble passage prevention member of a porous plate shape disposed on a part where the liquid guiding pipe and the branching liquid guiding pipe are connected to each other, for preventing bubbles generated in the liquid from entering the branching liquid guiding pipe from the liquid guiding pipe, wherein a surface of the bubble passage prevention member is coplanar with an inner wall surface of the liquid guiding pipe.