1: Overview 
 WR series industrial precious metals platinum and rhodium thermocouple thermocouple known, as the temperature measurement sensor, usually associated with temperature transmitter, controller, and display instruments and other facilities used to form the process control system to directly measure or control the manufacturing process 0-1800 ℃ species within the fluid, vapor, gas and solid surface such as temperature. 
 Platinum-rhodium thermocouple is composed of two different components of the synthetic circuit conductor connected at both ends, when the two junction temperature at the same time, it will generate heat inside the loop current. If the working end of the thermocouple reference junction with the existence of temperature, the meter will display instructions generated by a thermocouple thermoelectric power corresponding to the temperature. 
 Platinum-rhodium thermocouple thermal electric heat will end as the measurement of temperature and increase its size with only two ends of the thermocouple material and temperature, and hot electrode length, diameter, has nothing to do. 
 A variety of platinum-rhodium thermocouple shape, because they need very different, but their basic structure is similar, usually by heating the electrode, the insulating sleeve to protect pipes and junction boxes and other major constituents. 

 2: Application 
 Platinum-rhodium thermocouple for high temperature applications of the production process, widely used in powder metallurgy, sintering furnace bright, vacuum furnaces, smelting furnaces, glass, ceramic and steel-making furnaces and other industrial salt bath temperature. 

 3: The main technical parameters 
 Electrical Export: M20x1.5, NPT1 / 2 
 Accuracy class: I, II 
 Protection: IP65 
 Thermocouple wire diameter: Φ0.5 
 Pressure: atmospheric pressure 

 4: Measure the temperature and tolerance 

 Thermocouple type code dividing the maximum number of temperature measurement temperature tolerance △ t ℃ 
 Platinum Rhodium 30 - Platinum Rhodium 6 WRR B 0 ~ 1800 0-1600 ± 1.5 ℃ or ± 0.25% t 
 Platinum Rhodium 10 - Platinum WRP S 0 ~ 1600 0-1300 ± 1.5 ℃ or ± 0.25% t 
 Nickel-chromium - nickel silicon WRN K 0 ~ 1300 0-1100 ± 2.5 ℃ or ± 0.75% t 
 Nickel-chromium - copper-nickel WRE E 0 ~ 800 0-800 ± 2.5 ℃ or ± 0.75% t 

 5: Models and Specifications 

 Model No. Temperature Range ℃ indexing protection tube material 
 Thermal response time 
 Specification 
 d L xl 
 WRP-130 

 WRP2-130 
 S 0-1300 high alumina <150S Φ16 300x150 

 350x200 

 400x250 

 450x300 

 550x400 

 650x500 

 900x750 

 1150x1000 

 1650x1500 

 2150x2000 

 WRP-131 

 WRP2-131 
 <360S Φ25 
 WRQ-130 

 WRQ2-130 
 R 0-1300 <150S Φ16 
 WRQ-131 

 WRQ2-131 
 <360S Φ25 
 WRR-130 

 WRR2-130 
 B 0-1600 corundum tube <150S Φ16 
 WRR-131 

 WRR2-131 
 <360S Φ25 

 1) Thermocouple order Class I of the agreement; 

 2) into the part of non-carbon steel.