uality, and the other structural properties are the same as that of the wet water meter. WATER METER READING SYSTEMThere are two types of meter reading system: inlude wireless meter reading and wired meter reading system.There are 485 transmission mode and m-bus transmission mode. 485 transmission mode is mainly characterized by four lines (two power lines, two signal lines), which need to distinguish the polarity of lines; M-bus transmission mode is characterized by two lines, both power suppl