Calibration Design and Test of Photoionization Gas Sensor
Abstract
A dynamic gas-mixing system and PID measurement system were designed. Three VOCs of series concentration were obtained through the controlling on-off of the three-way solenoid valve, and the corresponding circuit design and test were completed. The result shows that the output voltage of the system has a good linearity with the concentration of the gas in the concentration range from 0 to 20ppm, which indicates that it is effective to the dynamic mixing of the gas by the controlling on-off of the solenoid valve. The response sensitivities of the system to three VOCs are different, the sensitivity to butane is the highest, and the sensitivity to xylene is the lowest. The dynamic gas-mixing system can be used in gas sensor calibration.
Keywords
Photoionization detector (PID), Gas sensor, Volatile organic compound (VOC)
DOI
10.12783/dtcse/iteee2019/28775
10.12783/dtcse/iteee2019/28775
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