Introduction of a semiconductor gas sensor

When the semiconductor surface in contact with the test gas is formed when some of the physical properties of conductivity changes , it is the use of this principle to detect the gas . Acting between the gas and the semiconductor , when the change is formed on only the inner or deep into the semiconductor surface of the semiconductor , according to these two changes , it can be controlled into the body and the surface control type .The semiconductor Positioning Sensor is divided into the characteristic parameters of recovery time , the initial settling time , response time, resolution, sensitivity and resistance values ​​.Initial stabilization time : If the gas Crank Shaft Sensor in a long time not used , then it will surface adsorption of some gases in the air and water , it will change its surface state. After more than a negative charge , if the temperature rises , then the desorption of the gas sensor of the phenomenon will occur . So, if the gas sensor for a long time did not work, to revert to your normal working state , you need to wait for some time, which is called the gas sensor initial settling time.Recovery time : in work related temperatures measured in this component of the gas desorption top speed , usually from the measured gases and gas sensor away from each other when the start time, usually when it reaches the resistance in clean the resistance of the air being 63% of the time to stop time, this time period is the recovery time of gas sensor .