This paper analyzes the metering error of floating roof tank caused by the floating tray to guide the installation of liquidometer.

对浮盘所造成的浮顶罐计量误差进行,用以指导液位仪装。

This article mainly designed one kind to use composition and so on PLC and flowmeter, PH idea, thermometer and liquidometer industrial sewage processing control systems.

本文主要设计利用PLC与流量计、PH计、温度计和液位计等组成的工业PH计 污水处理控制系统。