Electrochemical/Zirconia Working Principle

Electrochemical principle: It consists of two electrodes - the cathode is a piece of PTFE coated with an active catalyst, and the anode is a lead block. This sealed container has only one capillary pore at the top, allowing oxygen to pass through and reach the working electrode. The two electrodes are connected to two protruding pins on the sensor surface via current collectors, and the sensor is connected to the device it's being used with through these two pins. The sensor is filled with an electrolyte solution that enables different ions to exchange between the electrodes.

Zirconia principle: It utilizes the unique physical properties of zirconia at high temperatures. A zirconia sensor measures oxygen by detecting the partial pressure of oxygen in the sample gas. It has a fast response time and is widely used in high-temperature applications, such as boiler combustion control.

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