A device for controlling the moisture content of liquid materials, containing pipelines, a device for transporting liquid material a constant speed, a heater and thermistors, a measuring circuit, an amplifier, a trigger, a thyristor and an indicator element, characterized in that a constant level tank is used to transport liquid material at a constant speed, in the outlet pipe of which, on the horizontal section of the pipelinein radial holes across the flow of liquid material, two thermistors are sequentially installed, the second of which is equipped with a heater, while both thermistors are included in the arms of the bridge measuring circuit, and the heater is connected to a voltage source through a thyristor switch,