In terms of accuracy, the circular one is slightly higher, but the reaction speed is slower than that of the parallel electrode method, that is, the sensitivity is not as high as that of the parallel electrode plate. Parallel electrode plate has high sensitivity, but it has a stronger impact on static electricity and environment, while Tong Yuan capacitance has a relatively small impact on static electricity and environment, and each has its own advantages and disadvantages. There is still a big difference in individual prices. Generally speaking, the price of Tong Yuan capacitors is higher.
At present, there are two kinds of air purifier tests, one is to remove dust and fine particles in the air by circulating physical adsorption of air, and the other is to purify the air by generating a large number of negative ions by electrode method. The latter method usually uses negative ion detectors, but the negative ions released by various air purifiers have different effects. This requires a good negative ion detector to detect and judge its air purification effect according to how far the negative ion is from the air purifier. Generally speaking, it is more appropriate to choose American AIC20M air negative ion detector and Japanese KEC990 air negative ion detector. Why choose parallel electrode plates? The reason is that parallel electrode plates have high sensitivity to reaction speed, which can generally avoid static electricity and environmental influence indoors, and their prices are not particularly expensive.
High-power industrial-grade negative ion generators are generally 40-50 million or even hundreds of millions. How to choose negative ion detector? At present, there is only American AIC200M negative ion detector with the measuring range of1000-200 million /cm3. At present, it is the largest negative ion detector on the market. It is also the first choice for industrial grade.