b) Viscometer with thermistor sensors (TC visco meter)In the case of TC viscometers, glass-coated thermistors serving-as sensors are molten in on the level of the measurement planes. While the meniscus passes rough the measurement planes, the differences in the thermal conductivity properties of air and liquid lead to a change in the heat balance The thermistors of the TC viscometers are molten hermetically tightly into the glass coating of the viscometer, so that the viscometers located inside are chemically resistant to all kinds of substances other than strong leaches, fluoric solutions, or concentrated hot phosphate solutions