For monitoring kitchen and cellar areas for unwanted water ingress. For checking electrically conductive liquids. Detection is carried out using the separately available sensor band 1538/02. Visual alarm signal via flashing stop button. Additional visual or acoustic display possible using Busch alarm insert 1563 U-12 or signal transmitter insert 1561 U. Reset mode (immediately/only after moisture has been eliminated) can be selected using an internal jumper. No spreader. Screw fastening via keyholes.