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，、阻、变送器、流量计、液位计的选择。

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.

本文主要设计了一利用PLC与流量计、PH计、温度计和液位计等组成的工业PH计 污控制系统。

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、换器、孔板流量计、泵、微压计、温度计等仪器设备组成的封闭式冷却塔实验台。

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计和涡轮流量计的响应函数来控制气液分离,其控制算法是基于BP网络改进的PID控制算法。