The zirconia sensor used for combustion atmosphere measurement and control can not only stabilize and improve product quality, but also has the advantage of shortening the production cycle and saving energy.
The zirconia sensor is designed in an environment of 650°C or higher using the oxygen ion conductivity of stable zirconia ceramics. Under certain temperature conditions, if there are different oxygen partial pressures (ie oxygen concentration) in the gas on both sides of the zirconia bulk ceramic, a series of reactions will occur inside the zirconia ceramic, and oxygen ions will migrate. At this time, the stable millivolt signal can be measured by the extraction electrodes on both sides of the zirconium dioxide, which we call the oxygen potential.
The zirconium oxide sensor follows the Nernst equation: where E is the oxygen potential (mv) output by the zirconium oxide sensor, Tk is the absolute temperature (K) in the furnace, P1 and P2 are the oxygen partial pressures of the gas on both sides, zirconium dioxide. In practical applications, one side of the zirconium dioxide is introduced into a gas with a known oxygen concentration (usually air), which we call the reference gas. The other side is the gas to be measured, which is the atmosphere in the furnace that we want to detect. The signal output by the zirconia sensor is an oxygen potential signal. Through the Nernst equation, we can get the relationship between the oxygen partial pressure and the oxygen potential in the furnace atmosphere.
When the reference gas is air, it can be expressed as: where E is the output oxygen potential of the zirconia sensor; Tk is the absolute temperature in the furnace; P02 is the partial pressure of oxygen in the furnace. The zirconia sensor product is equipped with a self-heating device. The temperature is usually guaranteed at 700°C, so the TK value is basically constant, so the oxygen partial pressure concentration in the furnace can be directly measured by the above formula. In engineering applications, the standard gas is used to calibrate the corresponding relationship between the output oxygen potential E of the zirconia sensor and the oxygen partial pressure concentration PO2. For the most accurate, this method is also the most accurate calibration method.
The principle of the zirconia sensor is to use zirconia ceramic sensitive elements to measure the oxygen potential in various heating furnaces or exhaust pipes, and to calculate the corresponding oxygen concentration according to the principle of chemical equilibrium to monitor and control the combustion air ratio in the furnace to ensure the product Quality. And the measuring element has exhaust gas emission standards, which is widely used in various types of coal combustion, oil combustion, gas combustion and other furnace atmosphere control. It is the best way to measure the combustion atmosphere at present and has a simple structure. Quick response, easy to maintain, easy to use, accurate measurement. The zirconia sensor used for combustion atmosphere measurement and control can not only stabilize and improve product quality, but also has the advantage of shortening the production cycle and saving energy.
The zirconia sensor is designed in an environment of 650°C or higher using the oxygen ion conductivity of stable zirconia ceramics. Under certain temperature conditions, if there are different oxygen partial pressures (ie oxygen concentration) in the gas on both sides of the zirconia bulk ceramic, a series of reactions will occur inside the zirconia ceramic, and oxygen ions will migrate. At this time, the stable millivolt signal can be measured by the extraction electrodes on both sides of the zirconium dioxide, which we call the oxygen potential.
The zirconia sensor follows the Nernst equation: where E is the oxygen potential (mv) output by the zirconia sensor, Tk is the temperature (K) in the furnace, P1 and P2 are the oxygen partial pressures of the gas on both sides, and zirconia. In practical applications, one side of the zirconium dioxide is introduced into a gas with a known oxygen concentration (usually air), which we call the reference gas. The other side is the gas to be measured, which is the atmosphere in the furnace that we want to detect. The signal output by the zirconia sensor is an oxygen potential signal. Through the Nernst equation, we can get the relationship between the oxygen partial pressure and the oxygen potential in the furnace atmosphere.
When the reference gas is air, it can be expressed as: where E is the output oxygen potential of the zirconia sensor; Tk is the temperature in the furnace; P02 is the partial pressure of oxygen in the furnace. Our zirconia sensor products are equipped with self-heating devices. The temperature is usually guaranteed at 700°C, so the TK value is basically constant, so the oxygen partial pressure concentration in the furnace can be directly measured by the above formula. In engineering applications, the standard gas is used to calibrate the corresponding relationship between the output oxygen potential E of the zirconia sensor and the oxygen partial pressure concentration PO2. For yes, this method is also an accurate calibration method.
The commonly used British SST zirconia high temperature oxygen analyzer (zirconia sensor)-OXY-Flex is recommended here, which can be used to control the boiler combustion system:
High precision linear output;
Configurable output: 4-20mA and 0-10VDC or RS232 COM port;
Optional output range: standard range 0-25% and 0-100% or can be fully adjusted via RS232 in 0-100% mode;
Externally triggered automatic or manual calibration;
It can be calibrated in ordinary atmosphere or known concentration force;
Periodic 3.3VDC logic output can diagnose the quality of the sensor pump cycle;
Optional filter settings allow suitable fast and dynamic output or slow stable output.
Zirconia oxygen sensor manufacturers
Zirconium oxide oxygen sensor
Titania oxygen sensor
Zirconia oxygen Analyzer