Special monitor for in-place detecting of cleaner water tank

The invention discloses a special monitor for in-place detecting of a cleaner water tank. The special monitor comprises a housing, an end cover, a detecting rod, an elastic part and a sensor, whereinthe right side of the housing is arranged on a machine tool protective plate in a penetrating mode; the left side of the housing is detachably connected to the machine tool protective plate fixedly; the end cover is detachably fixed onto the housing fixedly; the detecting rod is sequentially arranged on the center of the end cover and the center of the housing from left to right, and extends to the right side of the housing; a limiting part is arranged on the detecting rod; an elastic part sleeves the detecting rod; the elastic part is positioned between the inner part of the right side of thelimiting part and the inner part of the right side of the housing; the limiting part can be elastically connected in the housing in a sliding mode; the left end of the detecting rod abuts against thewater tank in a reliving m