Patent ID: 7437929
Filing Date: 2008-10-21
Classification: G01F

Abstract:
1. A liquid level detector comprising a float moving in accordance with variations in liquid level, a hard circuit board, resistors provided on the circuit board, a first sliding path made of a plurality of electrodes provided on the circuit board and connected to the resistors, and a first contact coming into contact with the first sliding path, the liquid level detector outputting an electrical signal based on resistances of the resistors which are varied by the first contact coming into contact with at least one of the plurality of electrodes forming the first sliding path in accordance with a variation of the float, a second sliding path electrically connected to the first sliding path being provided on the circuit board, and a second contact coming into contact with the second sliding path being provided, wherein each of the first and second contacts are directly electrically connected to an external circuit, and the circuit board is not directly electrically connectible to an external circuit.