The paper introduces the corrosion prevention of the automatic instruments for thermopair,resistance thermometer, transmitter, flowmeter levelmeter in Chemical processes.
It includes the function of vacuometer, atmospheric pressure altimeter, thermometer (environment) and pressuremeter (for example the standard pressure meter of sphygmomanometer calibration).
It is equipped with asphalt return tube, anti-puffing pressure vent valve, anti-aging overhead nitrogen valve, thermometer, volumeter and output asphalt rapid discharge valve and coupling.
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.
The thermometry principle and application of infrared thermometer are analyzed,and the comparison of the performance between pyrophotometer and infrared thermometer is made.
By inserting a tube into the melted iron to form a greybody tube and to make the emissivity steady.The temperature of the melted iron can be obtained using a optical fiber thermometer.