allowing evaporation heat measurements the channel is filled with a sample and the temperature of the sample is measured the evaporating sample attracts evaporation heat from the environment which can be measured by the sensor 22 the temperature slope is shown in fig2 a by the dashed line the evaporation heat can be calculated from the time course of the temperature between t 0 temperature in the beginning of the measurement when the measuring channel is filled with the sample and t 1 end temperature when the measuring channel is empty capacitance measurements can be performed at the same time determining the amount of the substance in the channel it is obvious that sensors and actuators as shown in fig2 can be arranged next and or above each other one may now appreciate that the invention discloses the construction of a channel device for the recording of thermal conductivity viscosity density dielectric constant etc of liquids and or gases sample where the sample is directed through a measuring channel with at least one inlet and one outlet orifice containing at least one sensor unit and is characterized in that a measuring channel is established by the substrate and a layer forming a wall which is arranged in a certain predetermined distance and fabricated i e by evaporation spin on sputtering drop on etc procedures where the layers can consist of synthetic resin glass ceramic etc and in that measuring units are deposited in layers in and or on the substrate and or in and or on.