ZRO2-II Zirconia Oxygen Analyzer is a common modern instrument, suitable for measuring the oxygen content of flue gas in various industrial boilers, kilns and heating furnaces. ZrO2-II type in-line oxygen analyzer has the characteristics of high sensitivity, excellent reproducibility and stability, automatic switching, fast response, wide range and continuous online measurement, etc. It can realize low-oxygen combustion control and achieve energy saving. Reduce environmental pollution and improve environmental quality.

ZRO2-II Zirconia Oxygen Analyzer Principle:

    1. It is constructed according to the principle of concentration difference battery. Like other batteries, it has two half-cells, and between the two electrodes, a solid dielectric zirconia is used to connect.

    2. At high temperature, when there is oxygen concentration difference on both sides of zirconia, an oxygen concentration difference battery is formed, and the electromotive force of the battery can be calculated according to the Nernst formula, namely:

    In the formula: E-concentration difference battery output, mV; n-electron transfer number, here is 4;

    R-ideal gas constant, 9.314 W*S/mol; F-Faraday constant, 96500 C;

    T - temperature, K; P"Q - oxygen partial pressure on high concentration side; P'Q - oxygen partial pressure on low concentration side.

    When the battery operating temperature is fixed at 700°C, the above formula is:

    It can be seen from the above formula that at a temperature of 700 °C, when the oxygen partial pressure on the solid dielectric side is air (20.6%), the electromotive force E is output from the concentration cell, and the oxygen partial pressure on the solid dielectric side can be calculated. This is the oxidation Oxygen measurement principle of zirconium oxygen content automatic analyzer.

ZrO2-II type in-line zirconia oxygen analyzer has stable and reliable oxygen measurement, prolongs service life, and improves self-diagnosis and anti-interference ability. The instrument has made obvious improvements in the following conveniences:

    1. The signal has the necessary self-diagnosis function.

    2, with a variety of linear range options.

    3. The heating curve given by the instrument temperature control system can meet the requirements of the zirconia material for the heating rate.

    4. The chemical formula and production process of the porous platinum electrode can ensure that the oxygen detector zirconia probe has a sufficient service life in the boiler smoke atmosphere.

ZRO2-II Zirconia Oxygen Analyzer Conditions of Use:

1. The installation site of the oxygen detector must meet the conditions:

   have enough working space;

   The instrument avoids vibration occasions;

   The flue gas temperature and pressure should be within the specified range of the instrument. (flue gas temperature＜650℃)

2. The signal converter needs to meet the conditions:

   Ambient temperature: 0-50℃

   Working ambient temperature: ≤90%

   Supply voltage: 220V.AC±10%Hz

   Power consumption: 150W

   No flammable, explosive and strong corrosive gases, and requires good ventilation.

ZRO2-II Zirconia Oxygen Analyzer Technical Parameters:

    Detector length: 0.2m, 0.4m, 0.8m, 1.0m, 1.2m, 1.4m (can be customized according to requirements);

    Measuring range: 0~25.0%;

    Measurement accuracy: 3%;

    Temperature accuracy: 700±1℃;

    Output signal: 0-10mA or 4-20mA;

    Response time: ≤5S (90% measured value);

    Load resistance: 0-800Ω (4-20mA output), 0-1.6kΩ (0-10mA output);

    Display: oxygen concentration (), oxygen potential (mV), furnace temperature (°C), heating voltage (V), range upper and lower limit (), upper and lower limit alarm ().

    Keyboard setting: alarm upper and lower limit setting, probe zero potential correction.

    Self-diagnosis content and fault category symbols: E-0 oxygen upper limit, E-1 oxygen lower limit, E-2 abnormal temperature (high), E-3 abnormal temperature (low), E-4 abnormal temperature (fast), E -5 Abnormal temperature (stop), E-6 Abnormal oxygen potential E-7 Disconnection.