This Micro-fuel Cell by Teledyne is uniquely designed for monitoring UltraTrace oxygen. It’s capable of bringing ppb levels down to a single digit. This is enabled by the thermoelectric sensor cooling, which prevents parasitic electrochemical and dependent reactions within the cell. With external valves, remote access is provided for auto zero and span functions. The linearity of analysis goes across three ranges, which are user-selectable. Process upsets are followed with auto-ranging. The sensor requires no maintenance. Example applications include semiconductor manufacturing, air separation and liquefaction, and gaseous monomer process monitoring.