WRN - 291 small body thermocouple fixed screw thread

WRN - 291 fixed screw thermocouple is on the basis of simple type fixed screw, can be convenient to users of fixed installation.

the basic principle of

will be two different welding material A conductor or semi-conductor A and B, form A closed loop. When the conductor A and B two persistent point temperature difference between 1 and 2, occurs between the electromotive force, thus forming the size of A current in the circuit, this kind of phenomenon called the thermoelectric effect. Thermocouple is in using this effect to work.

now use morer international temperature scale with Fahrenheit and Celsius scale, the thermodynamic temperature scale and the practical temperature scale.

the Celsius scale ( ℃) Regulation: under normal atmospheric pressure, the melting point of ice to 0 degrees, the boiling point of water is 100 degrees, among 100 divided into equal parts, each divided into 1 degrees Celsius, symbols for ℃.

the Fahrenheit scale ( ℉) Regulation: under normal atmospheric pressure, the melting point of ice is 32 degrees, the boiling point of water is 212 degrees, among 180 divided into equal parts each equal to 1 f symbols for ℉.

thermodynamic scale ( The symbol T) Also known as the kelvin scale ( Symbol K) , or fine scale, it provides excellent molecular motion to stop when the temperature is zero.

the international practical temperature scale is an international agreement sexual scale, it close with thermodynamic temperature scale, repetition and high precision, easy to use. Current international temperature scale is 1975 15th international congress through the right degree of the international practical temperature scale - 1968 Revised in 1975, remember: IPTS - 68 ( 牧师- 75). 。 But as a result of IPTS - 68 temperature there is no catch, international metrology committee in the 18th international congress on measuring resolution authorized to 7 meeting through the international ITS 1990-1989 90，ITS- Alternative IPS - 90 scale 68. Since January 1, 1994 in our country implement ITS - * * 90 international temperature scale.