ZRO2-II Zirconia Oxygen Analyzer

The ZRO2-II zirconia oxygen analyzer is a commonly used modern instrument, suitable for measuring the oxygen content of flue gas in various industrial boilers, kilns, and heating furnaces. The ZrO2 II direct insertion oxygen analyzer has the characteristics of high sensitivity, reproducibility and stability, automatic switching, fast response, wide range, and continuous online measurement. It can achieve low oxygen combustion control, save energy, reduce environmental pollution, and improve environmental quality.

Principle of ZRO2-II zirconia oxygen analyzer:

1. According to the principle of concentration difference battery, like other batteries, it has two half cells, and is connected between the two electrodes with solid dielectric zirconia.

2. At high temperatures, when there is an oxygen concentration difference on both sides of zirconia, an oxygen concentration cell is formed, and the magnitude of the cell's electromotive force can be calculated according to the Nernst formula, that is:

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

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

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

When the working temperature of the battery is fixed at 700 ℃, the above equation is:

From the above equation, it can be seen that at a temperature of 700 ℃, when the oxygen partial pressure on the side of the solid dielectric is air (20.6%), the electromotive force E output by the concentration cell can calculate the oxygen partial pressure on the side of the solid dielectric. This is the oxygen measurement principle of the zirconia oxygen analyzer.

The ZrO2 II direct insertion zirconia oxygen analyzer has stable and reliable oxygen measurement, prolongs service life, and improves self diagnosis and anti-interference capabilities. This instrument has made significant improvements in the following aspects:

1. The signal has necessary self diagnostic function.

2. Has multiple linear range options.

3. The temperature rise curve provided by the instrument temperature control system can meet the heating rate requirements of zirconia materials.

4. The chemical formula and manufacturing process of porous platinum electrodes can ensure that the oxygen detector zirconia probe has sufficient service life in boiler flue gas atmosphere.

Usage conditions of ZRO2-II zirconia oxygen analyzer:

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

There should be sufficient workspace;

Avoid vibration scenarios for instruments;

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

2. The signal converter needs to meet the following conditions:

Environmental temperature: 0-50 ℃

Working environment temperature: ≤ 90%

Supply voltage: 220V. AC ± 10% Hz

Power consumption: 150W

No flammable, explosive, or highly corrosive gases, and good ventilation is required.

Technical parameters of ZRO2-II zirconia oxygen analyzer:

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

Measurement range: 0~25.0%;

Measurement accuracy: 3%;

Temperature accuracy: 700 ± 1 ℃;

Output signal: 0-10mA or 4-20mA;

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

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

Display: Oxygen concentration (), Oxygen potential (mV), Furnace temperature (℃), Heating voltage (V), Range upper and lower limits (), Upper and lower limit alarms ().

Keyboard settings: Alarm upper and lower limit settings, probe zero potential correction.

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