The detection principle of oxygen detector

User:JXCTUpload time:Dec 29 2021

Oxygen is an essential gas in our lives. Without oxygen, we would suffocate to death. The oxygen detector is also indispensable.

Oxygen, chemical formula O₂, molecular weight 32.0, colorless and odorless gas. It is the most common elemental form of oxygen. Melting point is -218.4 ℃, boiling point is -183 ℃. Under normal temperature and pressure, the density of oxygen is 1.429 g/L. It is not easily soluble in water, and about 30 mL of oxygen can be dissolved in 1 L of water. Oxygen in the air accounts for about 21%. Liquid oxygen is sky blue, solid oxygen is blue crystals

The detection principle of oxygen detector

The air and the gas to be measured diffuse through the diffusion membrane to the sensing electrode. The control circuit maintains a voltage sufficient to start an electrochemical reaction between the sensing electrode and the counter electrode. The electrochemical reaction generated under the action of the measured gas forms an electric current between the two electrodes. The intensity of this current is proportional to the concentration of the gas being measured. And it is reversible. The control circuit also forms a bias level between the sensing electrode and the reference electrode. This level does not form a current between the two poles. The rapid response of the sensor enables it to perform real-time and continuous detection of the surrounding air.

1、The imported electrochemical sensor has good anti-interference performance, and the service life is 2-3 years.

2、Adopt advanced micro-processing technology, fast response speed, high measurement accuracy, good stability and repeatability.

3、The detection site has the on site sound and light alarm function, and the gas concentration exceeds the standard immediately. It is a safety guarantee for work in hazardous locations.

4、On site large screen LCD display with backlight, intuitive display of gas concentration, type, unit, working status, etc.

5、Independent air chamber, no on-site calibration is required to replace the sensor, and the key parameters of the sensor are automatically identified.

6、Digital automatic tracking and compensation of temperature in the whole range to ensure measurement accuracy.