SheathThermocouple&RTD

 1.Principle ofThermocouple

 based upon Seeback Effct,i.e. if two different composition of homogeneous conductor A, Bcompose closed circuit, when two ends have temperature gradient, anelectric current passes through in the circuit and then two endshave Seeback electric potential, whereeas this elentric potentialis called thermoelectrical potential.

  2. This kind ofproducts is called medium temperature&medium voltagethermometer well type thermocouple, it''s widely used in the powerplant. 

sheath thermocouple&RTD