Photo ionization detector（ PID） sensor to detect volatile organic compounds（ VOC） gas

through study on PID

design PID detector structure adapt to this system

and set up a complete set of detecting system. It is proved by experiments that VOC gas detection system using PID detector as core can realize quantitative detection of VOC gas. Determined experimental flow is 160

170 mL/min

and response of sensor has linear relationship at range of（ 0

5） × 10

-6

.