Features: 
 1, the application 

 Professional design for the power plant to meet the 30 million, 60 million kilowatts generating units and auxiliary equipment such as temperature measurement needs. Direct measurement of production process -200 ° C ~ 800 ° C range of liquid, vapor and gases and the solid surface temperature. 

 2, the working principle 

 Thermocouple electrode was composed of two different conductor materials. When the measuring end and the reference junction temperature difference, it will have thermoelectric power, the work of thermoelectric power meter will show the corresponding temperature value. Thermal resistance is the use of material changes in temperature, its resistance also changes with the characteristics to measure the temperature. When the resistance changes, the working instrument will show the temperature corresponding to the value of resistance. 

 3, main technical parameters 

 Product performance standards: 
 IEC584 
 IEC751 
 IEC1515 
 JB/T18622-1997 
 JB/T8623-1997 
 GB/T16839-1997 

 4, the measuring range and tolerance 

 Model No. tolerance level indexing 
 I II 
 Tolerance value of the temperature range ° C temperature range ° C tolerance values 
 WRN K ± 1.5 ° C -40 ~ +375 ± 2.5 ° C -40 ~ +333 
 ± 0.004ltl 375 ~ 1000 ± 0.0075 ltl 333 ~ 1200 
 WRM N ± 1.5 ° C -40 ~ +375 ± 2.5 ° C -40 ~ +333 
 ± 0.004 ltl 375 ~ 1000 ± 0.0075 ltl 333 ~ 1200 
 WRE E ± 1.5 ° C -40 ~ +375 ± 1.5 ° C -40 ~ +333 
 ± 0.004 ltl 375 ~ 800 ± 0.004 ltl 333 ~ 900 
 WRF J ± 1.5 ° C -40 ~ +375 ± 1.5 ° C -40 ~ +333 
 ± 0.004 ltl 375 ~ 750 ± 0.004 ltl 333 ~ 750 
 WRC T ± 1.5 ° C -40 ~ +125 ± 1 ° C -40 ~ +133 
 ± 0.004 ltl 125 ~ 350 ± 0.0075 ltl 133 ~ 350