Measuring probe for resistance-type water level digital sensor

The utility model discloses a measuring probe for a resistance-type water level digital sensor. The measuring probe is provided with an insulated circular tube, an electrode arranged in the insulated circular tube and a conductive connecting terminal; a conductive layer is arranged on the inner wall of the insulated circular tube; a fixed plug is arranged at each of the upper and lower ends of the insulated circular tube; the lower fixed plug is provided with a water inlet communicated with the inner cavity of the insulated circular tube; the upper fixed plug is provided with a vent hole; the lower end of the electrode is arranged on the lower fixed plug; the upper end of the electrode penetrates through the upper fixed plug and is provided with an extending end; the conductive connecting terminal is connected with the conductive layer; the electrode is formed by alternately connecting a cylindrical section I and a cylindrical section II which have unequal diameters; and the cylindrical section I is as long a