GAS ANALYSIS SENSOR AND GAS ANALYSIS SYSTEM USING SAID SENSOR Russian patent published in 2011 - IPC G01N27/12 

FIELD: chemistry.

SUBSTANCE: disclosed gas analysis sensor has a substrate, a semiconductor film which can be brought into contact with a gaseous atmosphere, on the surface of which there is a first and a second electrode, and there is a third electrode on the surface of the substrate which can be connected to an external electrical circuit, on which there is a ferroelectric film, one of the surfaces of which is in contact with the third electrode and the second - with the semiconductor film. The disclosed gas analysis system has a gas analysis sensor, an information processing unit, a controlled voltage source, a switch and a controller. The third electrode of the gas analysis sensor is connected to the first output of the controlled voltage source, whose second output is connected to the first input of the switch, the second and third inputs of which are connected to the first and second electrodes, respectively. The first and second inputs of the switch are connected to the first and second outputs of the information processing unit, respectively, the input of which is connected to the third output of the controller, whose first output is connected to the third input of the switch, and the second output of the controller is connected to the input of the controlled voltage source.

EFFECT: invention enables to vary sensitivity of the gas analysis sensor and gas analysis system during operation.

2 cl, 1 dwg