| 摘要 |
PURPOSE: A multi liquid level sensing module is provided to prevent a malfunction caused by a minute liquid level change or external influence because an auxiliary detecting unit is installed in the outer side of a main body. CONSTITUTION: A multi liquid level sensing module comprises a main body(110), a substrate, and an auxiliary sensing unit(170). The main body comprises an internal casing(115) being inserted into inside of a tank storing fluid and an external casing(113) installed outside of the tank. The substrate supports a capacitance sensor(150) detecting a liquid level of the fluid. The auxiliary detecting unit is joined to the outside of the internal casing by corresponding to a position of the capacitance sensor. The capacitance sensor detects the liquid level of the tank inside based on a change of an electrostatic capacity of the auxiliary detecting unit according to a change of the liquid level of the fluid inside the tank. The auxiliary detecting unit comprises a conductor. |
