Moisture sensor element, method for producing a moisture sensor element, moisture or dew point sensor and moisture-measuring method

Moisture sensor element (10) according to one of the preceding claims, characterized in that the at least one material (16, 18) is a porous material (151, 152;

• 161, 162;
• 301, 302;
• 303, 304;
• 305, 306;
• 307, 308) in which
• 4.1 the pore sizes are chosen and distributed in such a way that the mass changes rapidly with moisture changing over a moisture value and/or
• 4.2 the deviation of the pore size of the pores from the medium pore size of the material is chosen in such a way that the mass changes rapidly with moisture changing over a moisture value.

Moisture sensor element (10) according to one of the preceding claims, characterized in that the at least one material (16, 18) is a defined-porous material (151, 152;

• 161, 162;
• 301, 302;
• 303, 304;
• 305, 306;
• 307, 308).

Moisture sensor element (10) according to one of the preceding claims, characterized by one, several or all of the following features:

• 7.1 that the at least one material (16, 18;
• 151, 152;
• 161, 162;
• 301, 302;
• 303, 304;
• 305, 306;
• 307, 308) is chosen from the group of microporous, mesoporous and macroporous materials;
• 7.2 that at least a part of the at least one material (16, 18;
• 151, 152;
• 161, 162;
• 301, 302;
• 303, 304;
• 305, 306;
• 307, 308) is treated with a surface-derivatizing reagent to change the wettability;
• 7.3 that at least a part of the at least one material (16, 18;
• 151, 152;
• 161, 162;
• 301, 302;
• 303, 304;
• 305, 306;
• 307, 308) is treated with an organosilane or organosiloxane as a surface-derivatizing reagent to change the wettability;
• 7.4 that at least a part of the at least one material (16, 18;
• 151, 152;
• 161, 162;
• 301, 302;
• 303, 304;
• 305, 306;
• 307, 308) is provided or treated with an additive to change the radiation absorption capacity towards light or infrared or heat radiation;
• 7.5 that the at least one vibrating element (14) is designed as a quartz crystal microbalance (100) and/or a quartz crystal tuning fork (200).

Method for producing a moisture sensor element (10) according to one of the preceding claims, comprising:

• 8.1providing a vibrating element (14) and
• 8.2coating the vibrating element (14) with at least one material (16, 18;
• 151, 152;
• 161, 162;
• 301, 302;
• 303, 304;
• 305, 306;
• 307, 308) the mass of which changes rapidly with moisture changing over a moisture value, wherein step 8.2 includes:
• 8.2.1 applying a precursor material to the vibrating element (14) and
• 8.2.2 creating pores in the precursor material to form the material the mass of which changes rapidly with moisture changing over a moisture value.