Teledyne Percent Oxygen Analyzer, 9060L operating instructions Zirconia Sensor

Operational Theory Model 9060L

2.2.2 The Zirconia Sensor

Input to the analyzer is obtained from a solid electrolyte oxygen probe containing a zirconia element and thermocouple. The probe is designed to be inserted into a boiler or furnace exit gas flue or similar process. The 9060LEX sensor is designed to be installed outside of the flue or process. Sampling lines and filters are not required for in-situ probes but they are required for 9060LEX sensors. When a sampling line is required, the gas typically flows to the sensor under process pressure. In applications where the process pressure is negative or neutral, a suction pump will be required. A reference air pump is not provided in the Model 9060L Oxygen Analyzer. The internal construction of a probe or sensor is shown in Figure 2-3.

Figure 2-3: Internal Structure of the Zirconia Sensor and Probe

Heater control in the Model 9060L Oxygen Analyzer consists of a time proportioning temperature controller and solid state relay so that the thermocouple junction is controller to over 700°C (1300°F). Probes operating in a combustion environment above 650°C (1200°F) do not

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