The non-dispersive infraredmethod (NDIR) is used to measure CO, CO2 and HC;
使用非扩散红外线（NDIR）光吸收方法分析HC、CO和CO2质量分数；
2
The infraredmethod can circumvent defensive strategies, such as shielding the keypad.
这种红外探测方法可以通过类似隐藏键盘的方式防卫入侵。
3
In this paper, we discussed the feasibility of using infraredmethod to measure the sulfur in it was discussed, and the comparaing with correlative criterion was performed.