Product Description 
 Industrial assembly type thermocouple as a sensor for measuring temperature, usually supporting the use of instruments, recording meter and electronic regulator. It can directly measure the surface temperature from 0 ° C ~ 1800 ° C within a variety of production processes liquid, steam and gas medium and solid. 
 According to state regulations, I plant to begin production from 1987 in line with international standards IEC dividing number of platinum and rhodium 30 - platinum and rhodium, platinum and rhodium 10 - platinum, nickel, chromium - nickel-silicon, nickel, chromium - copper-nickel, copper - copper-nickel iron - copper-nickel type thermocouple, shall comply with the JB/T3238-1999 the standard. 
 How it works: The working principle of the thermocouple: conductor at both ends of the two different components, welded to form a loop, direct temperature measurement side is called the measurement side, the terminal-side called the reference junction. Measuring side and reference side of the temperature difference, heat current in the loop and connected to the display instrument, the instrument indicates the thermocouple, the corresponding temperature value of thermal electromotive force. 
 Thermocouple thermal emf will grow the size of the thermal electromotive force and the difference in temperature of the thermocouple conductor material as well as at both ends, and the length and diameter of the hot electrode to measure the junction temperature rise. 
 Fabricated thermocouple junction box to protect the pipes, the insulating sleeve, terminal blocks, the hot electrode to form a basic structure, and with a variety of installation of fixtures. 
 Product technical data: 
 Temperature measurement range and the allowable error 
 Thermocouple category code indexing measuring range ° C to allow deviation △ t ° C 
 30 platinum and rhodium - platinum and rhodium 6 WRR B 0 ~ 800 ± 1.5 ° C or ± 0.25% │ t │ 
 Platinum and rhodium 10 - Platinum WRP S 0 ~ 1600 ± 1.5 ℃ or ± 0.25% │ t │ 
 Nickel chromium - nickel-silicon the WRN K 0 ~ 1300 ± 2.5 ° C or ± 0.75% │ t │ 
 Nickel-chromium - copper-nickel the WRE stabilization E, 0 ~ 800 ± 2.5 ℃ or ± 0.75% │ t │ 

 Note the "t" measured temperature to the temperature sensing element 
 Thermal response time 
 Temperature step change, the changes in the thermocouple output to the equivalent of 50% of the change, the time required is called the thermal response time T0.5. 
 Thermocouple nominal pressure 
 Generally refers to room temperature under the protection tube can withstand static pressure without breaking. In fact, allowing working pressure not only with the protection tube material, diameter, wall thickness is related to its structure, the installation method, into the depth and the measured flow rate and type of media and so on. 
 Thermocouple minimum placement depth 
 Should not be less than the protection tube diameter of 8 to 10 times (special exceptions). 
 Thermocouple insulation resistance (at room temperature) 
 The insulation resistance test voltage at room temperature for DC 500V ± 50V, measurements at room temperature insulation resistance of atmospheric conditions for the temperature 15 ~ 35 ℃, 45% relative humidity, atmospheric pressure 86 ~ 106kPa. 
 (a) the product of more than 1 meters in length thermocouple at room temperature insulation resistance value and its length should be not less than 100. 
 Rr.L ≥ 100 MΩ. The ML> 1m 
 Where: Rr-thermocouple at room temperature the insulation resistance value MΩ 
 (b) it's normal temperature insulation for a length equal to or less than one meter, thermocouple, resistance value should be not less than 100 MΩ 
 Upper limit temperature of the insulation resistance 
 Thermocouple insulation resistance shall be not less than the upper limit temperature performance that: 
 Ceiling temperature tm ° C test temperature t ℃ resistance value MΩ 
 ≤ 100 tm <300 t = tm 10 
 300 ≤ tm <500 t = tm 2 
 500 ≤ tm <850 t = tm 0.5 
 850 ≤ tm <1000 t = tm 0.08 
 1000 ≤ tm <1300 t = tm 0.02 
 tm> 1300 t = 1300 0.02 


 Product Selection information: 

 The contents of the WR specifications 
 R-platinum and rhodium 30 - platinum and rhodium 
 P 10 - platinum, platinum and rhodium 
 N nickel-chromium - nickel - silicon 
 E nickel chromium - copper-nickel (Ni - Cr - constantan) 
 Heat 
 Electricity 
 Even 
 Material 
 Material - no fixed device type 
 2 fixed, threaded 
 3 movable flange 
 Four fixed flange type 
 5 activities flange Square in the form 
 Six fixed thread cone to protect the tube 
 Mounting in the form of splash type 
 Of three water 
 4 flameproof type 
 The form of a junction box? 16mm protective tube 
 1? 25mm protective tube (double casing) 
 2? 16mm aluminum tube (single tube) 
 3? 20mm high aluminum tube 
 Design Number 
 WR □ - □ □ □ 




 Attachment: 
 Contact: 13901423890 

 Contact: Mr. Chen 

 : 1,186,013,563 mailbox: 1186013563@qq.com The 

 Company: Jiangsu Plaza Premium Electric Instrument Co., Ltd. / on Hai Kaitai Instrument Co., Ltd. 

 Website: www.cnhuanya.com / www.shktai.com