VORRICHTUNG ZUM MESSEN DES FEUCHTIGKEITSGRADES VON GASEN

A description is given of a device for measuring the moisture level of gases by means of a supporting element containing a basic electrode, a counter-electrode and a porous layer. The moisture penetrating the porous layer produces a capacitance or resistance change from which the moisture level can be determined. Known moisture level meters exhibit interfering hysteresis behaviour and a lengthy response time. According to the invention, the supporting element is reduced to membrane thickness in the area of the electrodes and the porous layer, and it exhibits resistance to heat. By using this resistance to heat, the porous layer is heated in such a way that the capacitance and resistance assume a value that can be predetermined. The heat output absorbed here represents a measure of the moisture level. The device according to the invention proves its worth under difficult measuring conditions such as low temperature, low air humidity and low pressure.