What is the principle of negative oxygen ion detector?

The content of negative oxygen ions in the air is a key factor to determine the quality of air. From the perspective of natural ecosystems, forests and wetlands are the main places where negative (oxygen) ions are generated in the air. It has a regulating effect on air purification and urban microclimate, and its concentration is one of the indicators to evaluate urban air quality. So it is necessary to use the negative oxygen ion detector to detect its concentration, and what is the principle of the negative oxygen ion detector?

Binocular ion detector is a mature method in the middle and high grade air ion detector at present. Its overall structure consists of three concentric cylinders, the surrounding cylinder body and the inner axis as electrodes, when the air through the cylinder after the ion impact on the heel of the cylinder and discharge and record the discharge signal, so that the amount and size of positive and negative ions in the air can be measured.

The detector is technically mature, but due to its complex internal structure and control and other reasons, the cost is high. The structure can effectively solve the problem of electrolytic edge effect inherent in the parallel electric plate structure, and the cylinder's own structure and special air intake mode can maintain the smoothness of the air flow. The accuracy of ion number and size detection has also been greatly improved.