Dew point detection method and device

A device for dew point detection, comprising

• a piezoelectric sensor having a surface directly subjected to the condensation and presence of dew and liquid to be detected whereby said condensation, dew and liquid are provided directly on said surface;
• wave producing means for producing an acoustic surface wave on the surface of said sensor whereby said condensation, dew and liquid are in contact with said acoustic wave;
• detecting means for detecting said wave after transmission thereof across said surface;
• and
• measuring means for measuring a parameter of the detected wave corresponding to the dew or liquid and thereby indicating the dew point or presence of liquid on said surface.

A method of measuring the volatility of a liquid utilizing a piezoelectric sensor having a surface for detecting the volatility of a liquid, said method comprising the steps of

• producing an acoustic surface wave on the surface of the sensor;
• subjecting the surface of the sensor directly to the presence of liquid the volatility of which is to be measured thereby providing said liquid directly on said surface and in contact with said acoustic wave;
• detecting said wave after transmission thereof across said surface;
• and
• measuring a parameter of the detected wave corresponding to the liquid, said parameter being a factor in the determination of the volatility of liquid on said surface.

A device for the detection of the volatility of a liquid, said device comprising

• a piezoelectric sensor having a surface directly subjected to a liquid the volatility of which is to be measured thereby providing said liquid directly on said surface;
• wave producing means for producing an acoustic surface wave on the surface of said sensor thereby providing said liquid in contact with said acoustic wave;
• detecting means for detecting said wave after transmission across said surface;
• and
• measuring means for measuring a parameter of the detected wave corresponding to the liquid, said parameter being a factor in the determination of the volatility of liquid on said surface.