| Answer |
In In-situ measurement method, an oxygen sensor is inserted into the position exactly where you want to measure oxygen concentrations. Since the sensing tip is in the very position where you want to measure, measurement is made simultaneously, and no other factor than oxygen concentration affects the measurement. However its installation is very limited by the temperature because a zirconia oxygen sensor functions properly only above 700°C. Ex-situ measurement can be recommended when the temperature is below 700°C. In Ex-situ measurement, the gas will be extracted from the location to be measured and injected into an appropriately heated oxygen sensor. Another advantage of Ex-situ measurement is that oxygen concentrations can be measured even when the inside of the facility is too narrow for a sensor to be installed, because we can locate the oxygen sensor outside the facility. |
