METHOD FOR THE CONTROL OF THE RESPONSE TIME OF A SENSOR FOR CHEMICAL SUBSTANCES

摘要

The present invention relates to a method for the control or the response time of a sensor (1) for chemical substances, said sensor (1) being comprised of a first (2) and a second (3) pins, at least a layer of active material deposited between said first (2) and said second (3) pins, said active material varying its own impedance following the contact with said chemical substances and as a function of their concentration, and a further control pin (4); said method being characterized in that it provides at least a phase of detection of said chemical substances corresponding to an absorption of said chemical substances by said material, and at least a phase of recovery of said sensor, corresponding to a desorption of said chemical substances by said material; and in that during said phases of detection and recovery a signal is applied to said control pin (4), suited to solicit the absorption or desorption of said material varying the duration of the respective phases of detection and recovery.