The Ntron High Purity Product line offers a combination of electrochemical and Zirconia oxide sensors. Zirconia sensors provide fast response and long life and are also very stable over long periods of time. Zirconia sensors are solid-state devices utilizing a yttria-based Zirconia solid electrolyte sensor. The robust design of the Zirconia sensor assures accurate measurement as well as a quick response characteristic to serve a wide range of oxygen measurement applications.
A major advantage of the Zirconia sensor is that it is not affected by position. Additionally, there exists no real limitation on shelf life or storage temperature. Sensors may be exposed to severe temperatures and perform to specification once brought up to operating conditions and may be exposed to several G-Force with no ill effect on performance.
How does a Zirconia Sensor Work?
The Neutronics Zirconia sensors are designed to measure an extracted or pumped positive pressure gas sample or simply measure by diffusion. They rely on a reference gas; usually air, to make a differential calculation.
At the heart of the remote sensor unit is a solid state Zirconia Cell. The cell is constructed of a ceramic tube with a platinum coating on the inside and outside. At 725˚C, oxygen is electrochemically reduced at the cathode. The voltage produced is proportional to the net difference in the partial pressures of oxygen in the reference gas versus the sampled gas. The unique design results in a sensor, which has extremely fast response in addition to the capability of a wide measurement range: 100% to ppm or ppb concentration O2.
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