Static characteristic, thermal converter, heating element, reliability, operating mode, humidity. In this paper, the main characteristics of thermal converters of moisture content of liquid materials are investigated. The static characteristics of the thermal moisture transducer of liquid materials were studied for three possible modes of operation: - at a constant heating power PНЭ=const; - at constant temperature difference ΔT=const; - with discrete switching on and off of the heating element. It is shown that a simpler and more reliable mode of operation takes place at PNE=const, which is quite suitable for automatic control systems for the moisture content of liquid materials.