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[China Instrument Network Instrument Industry] According to the latest news, Wuxi City, Jiangsu Province will replace the civilian water meter this year, from the original wet-type water meter gradually replaced with a dry-type water meter.

In the winter of 2015, the frozen weather that has not been seen in many years in Wuxi City of Jiangsu Province directly caused the damage of the water meters in the homes of tens of thousands of residents, which caused great impact on the daily life of the residents. So why are so many water meters unable to withstand the cold "test"? The reason is that Wuxi City is located in the southern part of China, and very few cold weather occurs. Therefore, wet water meters are installed in all residential water meters, and dry water meters are installed in cold regions in northern China. Recently, it was learned from the city water company that in order to prevent the water meter from being damaged again on a large scale, the civilian water meter will be gradually replaced by a dry-type water meter from the original wet-type water meter.

Then, what are the main differences and advantages of dry-type water meters compared to wet-type water meters? The biggest difference between a dry meter and a wet meter is the metering mechanism. The impeller is separated from the sun gear, and the upper end of the impeller is coupled with the magnetic element at the lower end of the sun gear by a magnetic element (magnetic ring or columnar magnet). When the water flow drives the impeller to rotate, the magnetic element at the upper end of the impeller attracts or repels the magnetic element at the lower end of the sun gear and drives the central gear to rotate synchronously, and the central transmission counter records the amount of water flowing through the water meter.

Because the counting mechanism of the dry type water meter is isolated from the measured water, it is not affected by the suspended impurities in the water. It can ensure the normal operation of the counting mechanism and the reading clearly. At the same time, it will not be caused by the temperature difference between the inside and outside of the table like the wet water meter. Fog or condensed water under the glass affects the phenomenon of water meter reading. In cold weather, the surface glass of the water meter will not freeze or crack. Even if the glass is accidentally broken during use, the water will not overflow. , security is good. However, due to the relatively complex structure of the dry water meter, the production technology and assembly process requirements of the manufacturer are relatively high. Therefore, the غير مجاز مي باشدt of the dry water meter is slightly higher than that of the wet water meter.

(Original title: My citizen's water meter will be gradually changed from "wet" to "dry")

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