Abstract: Detecting air ingredients is obtained, a heater and gas sensitive acting layers are arranged on a substrate, which are connectable to an analyzing unit. Electrical resistances of n acting layers are connected in series; heater is a temperature sensor connected in parallel with this series connection, electrical resistance of heater is smaller than the sum of electrical resistances of acting layers and resistances are connected with a total of n+1 electrical terminals via electrodes so that heater is connected with two terminals and n?1 other terminals are connected with a respective junction that interconnects two acting layers. Heater is intermittently heated so that a predefined constant temperature of acting layers is achieved, temperature of acting layers is acquired by determining electrical resistance of heater; voltages in the series connection of acting layers are analyzed and a concentration of gases are determined from electrical resistances of acting layers.
Type:
Grant
Filed:
November 23, 2005
Date of Patent:
June 15, 2010
Assignee:
UST Umweltsensortechnik GmbH
Inventors:
Olaf Kiesewetter, Anatolij Ewert, Volkmar Melchert, Sven Kittelmann
Abstract: A method and device for detecting condensation on surfaces of structural components. A evaluation signal is generated before dewing while the structural component is cooling. A detectable film is produced on a measuring arrangement a few degrees Kelvin before the dew point is reached. The temperature is measured directly on the layer where the dew is developing.
Type:
Grant
Filed:
July 10, 2001
Date of Patent:
May 20, 2003
Assignee:
UST Umweltsensortechnik GmbH
Inventors:
Olaf Kiesewetter, Erhard Altstadt, Horst Hansch, Albert Reinholz