High temperature molten metal level measurement experts: thermoelectric thermometer

In many parts of high temperature molten metal liquid level measurement, actually we instrument man often encountered in the metallurgical industry. Due to the particularity of itself to measure, at present in addition to the use of nuclear radiation thermometer, thermoelectric thermometer is commonly used for testing. Many people know that the radiation thermometer, but I do not know the thermoelectric thermometer. Let's to explain his works: Exx magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

it takes advantage of high temperature molten liquid at the interface between air and high temperature liquid phase mutation characteristics of temperature field, using the method of measuring temperature indirectly obtain high temperature molten metal liquid level. Magnetic flap | | glass thermometer thermometer Exx floating ball | | glass thermometer thermometer two-color thermometer

figure 2 ( a) For high temperature molten metal liquid level measurement of thermoelectric principle diagram of the thermometer. Choose a series of measurement point on container walls, installation of thermocouple, and record each point on the output of the thermocouple, as shown in figure 2 ( b) The temperature shown in - Thermoelectric potential distribution curve. Curve reflects the temperature has occurred between the seventh and eighth point mutation, so the liquid level is between 7 and 8 point. Exx magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

Exx magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

figure 2 a thermoelectric principle diagram and thermometer temperature thermoelectric potential distribution curve Exx magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

( a) Principle diagram; ( b) A thermoelectric potential temperature distribution curve Exx magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

1 - High temperature molten metal: 2 - Metal solidification; 3 a container; 4 a thermocouple thermometer Exx magnetic flap | | glass thermometer floating ball | | glass thermometer thermometer two-color thermometer

Exx magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

summary: thermocouple to measure liquid level is a relatively rough measuring method, precision generally is not high, and the precision is related to the thermocouple distribution, installation. Appropriately reduce the spacing of each thermocouple, increase the measurement point, can improve the metal level measurement resolution and measuring accuracy. Besides, thermocouple work end points of contact with the container to be thin, strong, therefore can be thermocouple wire welding in the vessel wall and the other by the container wall ACTS as a thermocouple. This measure accuracy is not high, but very reliable. In the mould process such as applications, is still a very practical crystallizer liquid level detection method. This method is not many manufacturers now in use, because technology is not mature, use less, we can seize the opportunity, research and development with great concentration, success is standing on the side of the skill. Magnetic flap | | glass thermometer thermometer Exx floating ball | | glass thermometer thermometer two-color thermometer

Exx magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer