The old flow-meter often uses the RS232 interface equipment as the data transfer way.But the bulk of the equipment is big, the memory space is limited and the shockproof capability is poor.

• 传统的水流流量计多数采用RS232接口设备作为数据转存的方式，设备体积较大，携带不便，且存储空间有限，防震性能不好。