A: Mkpu anwụrụ ọkụ anyị na-eji diode infrared emitting diode dị elu (IR LED), mara maka ịchọpụta ngwa ngwa nke ọkụ na-ese anwụrụ yana ibelata mkpu ụgha. Mkpu CO anyị na-eji ezigbo ihe mmetụta electrochemical maka nchọpụta carbon monoxide a pụrụ ịdabere na ya.














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