Fast Response of Amperometric Oxygen Sensors Based on an Iron Phthalocyanine‐Based Sensing Electrode at Ambient Temperature

To improve the slow response of ambient temperature fluoride‐based oxygen sensors, we propose an amperometric one of the type based on the fast ion conductors, and , and an iron phthalocyanine(FePc)‐based SE mixture of FePc, platinum‐black, and . Oxygen partial pressures in the range 2–300 kPa can be determined under either reduced or elevated pressure by measuring the short‐circuit current since this increases linearly with . The 90% response time depends strongly on content. The shortest , 30–45 s, is comparable to that of galvanic cell‐type sensors.