Table 1.

Introduction to main parts of gas sampling equipment.

Part	Model	Dimensions	Performance	Manufacturer
Micro pump	FNY6003	92$\times$83$\times$48 (mm)	maximum flow: 3L/min	Xin Wei Cheng Co., Ltd. China
Speed governor	KS-1	80$\times$45$\times$25 (mm)	Flow regulation range: 0-3 L/min	Xin Wei Cheng Co., Ltd. China
Electromagnetic valves	PYF3	30$\times$20$\times$12 (mm)	2-position 2-way	Pin Cheng Co., Ltd. China
Air bag	E-Switch	150$\times$150 (mm)	2 valves, 0.5 (L)	Sunrise Instrument Co.,Ltd. China