An oxygen sensor (or lambda sensor, where lambda refers to air fuel equivalence ratio, usually denoted by ?) is an electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed. We aims to provide a An oxygen sensor (or lambda sensor, where lambda refers to air fuel equivalence ratio, usually denoted by ?) is an electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed. We aims to provide a