The structure of a traditional water meter is usually divided into three parts: case, sleeve and watch core. Water enters the annular space at the lower part of the casing from the water inlet, and impinges on the impeller, causing the impeller to rotate and driving the counter to count.
It is worth mentioning that the reading of traditional mechanical water meter dials is skillful. Read from the high-pointer to the low-end, that is, read from the indicator dial of × 1000 clockwise from bottom to top. In particular, if the thousands, hundreds, and tens pointers are between two numbers, pay attention to the association between the two adjacent pointers. As shown in the figure, the pointer of “× 1” is between 6 and 7, which is very close to 6. Whether to read 6 or 7 depends on whether the dial pointer of × 0.1 is close to 0. We see that the dial pointer of × 0.1 is between 1 and 2, which means that there is no carry yet, so the unit pointer should read 6 instead of 7. If the dial pointer of × 0.1 is between 9 and 0, it is also possible to read 5.
Traditional water meters have a simple structure and low cost, but they are easily affected by the external environment. Especially the mechanical water meters installed outdoors are very vulnerable to damage in some areas where the temperature is below zero in winter. In some areas where the temperature is extremely low, large-scale water meters will be damaged, which will cause difficulties for residents to use water. In response to this situation, we have developed new products, such as ultrasonic water meters, etc. We will introduce such water meters in detail in future articles.