| 摘要 |
A gas sensor for determining the physical parameters of gases is disclosed, comprising a capacitor, the dielectric layer (3) of which is in contact with the gas, in such a way that a change in the physical properties thereof, leads to a corresponding change in the dielectric constant. A gel layer (4) is arranged on the gas sensor (1), in the vicinity of the dielectric (3). The sensor is embodied as a sensor for determining the moisture content of the gas. Foreign materials present in the passing gas stream are kept from the moisture sensitive layer itself (dielectric layer 3) on the capacitor, by means of the gel layer (4), whilst the water to be recorded in the humidity determination can easily reach this layer (4) by diffusion and diffuse out again.
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