The paper introduces the corrosion prevention of the automatic instruments for thermopair,resistance thermometer, transmitter, flowmeter levelmeter in Chemical processes.

介绍工业自动化仪表在氮肥，磷肥生产过程中，对检测控制仪表，热电偶、热电阻、变送、流量、的选择。

Bench of closed circuit cooling tower that is composed of boiler ,exchanger, orifice flowmeter, water pump, micromanometer , heat indicator and so on is established.

建立了由锅炉、换热、孔板流量、水泵、微压、温仪设备组成的封闭式冷却塔实验台。

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.

本文主要设了一种利用PLC与流量、PH、温和组成的工业PH 污水处理控制系统。

The responsion functions of the eddy street flowmeter and the turbine control the separation of the gas-liquid,it's arithmetic was based on BP neural network improved PID control.

文中提出利用涡街流量和涡轮流量的响应函数来控制气分离,其控制算法是基于BP网络改进的PID控制算法。