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                                                      Type:armored thermocouple

                                                      Illustrate:It is usually connected with display meter, recording meter and computer, etc. to display measuring temperature of liquid, vapor gas and solid surface ranging from 0℃ to 1300℃ during various production process.

                                                      Armored thermocouple
                                                       

                                                       
                                                      Feature 

                                                      1. With quick response, reducing dynamic error.
                                                      2. Optional installation methods
                                                      3. Wide measuring range
                                                      4. High mechanical strength, good pressure-resistant performance.

                                                       
                                                      Operation Theory

                                                      The electrodes of armored thermocouple are made of two different materials. The temperature 
                                                      difference between measuring end and reference and result in pyroelectric potential, then the
                                                      meter indicates the corresponding temperature to the pyroelectric potential.
                                                       
                                                      Main technical parameter
                                                      Executive standard 
                                                      IEC584
                                                      GB/T18404-2001

                                                      Measuring Range and Tolerance

                                                       
                                                       
                                                      Type
                                                       
                                                       
                                                      Graduation
                                                      Tolerance class
                                                      Tolerance value Measuring range C Tolerance value Measuring range C
                                                      WRNK K ± 1.5C -40~+375 ± 2.5C -40~+333
                                                      ± 0.004|t| 375~1000 ± 0.0075|t| 333~1200
                                                      WRMK N ± 1.5C -40~+375 ± 2.5C -40~+333
                                                      ± 0.004|t| 375~1000 ± 0.0075|t| 333~1200
                                                      WREK E ± 1.5C -40~+375 ± 1.5C -40~+333
                                                      ± 0.004|t| 375~800 ± 0.004|t| 333~900
                                                      WRFK J ± 1.5C -40~+375 ± 2.5C -40~+333
                                                      ± 0.004|t| 375~750 ± 0.004|t| 333~750
                                                      WRCK T ± 0.5C -40~+125 ± 1.0C -40~+133
                                                      ± 0.004|t| 125~350 ± 0.0075|t| 133~350
                                                      WRPK S ± 1C 0~+1100C ± 2.5C 0~600
                                                      ±[0.003(t-1100)]C 1100~1600C  ± 0.0025|t| 600~1600

                                                       
                                                       

                                                       
                                                       
                                                      Insulation resistance at normal temperature
                                                      The insulation resistance between electrode and protection tube of armored thermocouple is no less 
                                                      than 1000 MΩ.m under condition that environment temperature is 20 ± 15 C, relative humidity is more
                                                      than 80%, and testing voltage is D.C. 500 ± 50V.The insulation resistance of 1M long tested sample is
                                                      1000 MΩ.m, and that of 10 M long tested sample is 100 MΩ.m.
                                                       
                                                      Filament Diameter and Material
                                                       

                                                      Filament form simplex duplex
                                                      tube diameter Φ2 Φ3 Φ4 Φ5 Φ6 Φ8  Φ3 Φ4 Φ5 Φ6 Φ8
                                                      tube 
                                                      material
                                                      E,J,T 1Cr18Ni9Ti  1Cr18Ni9Ti
                                                      K,N 1Cr18Ni9Ti GH3030 1Cr18Ni9Ti GH3030
                                                      S GH3039 GH3039

                                                       

                                                       
                                                      Threaded head with sleeve type joint
                                                       

                                                      Code and size Outer diameter of
                                                      armored thermocouple
                                                      Φ8 Φ6 Φ5 Φ4 Φ3 Φ2
                                                      M M16*1.5 M12*1.5
                                                      S 22 19

                                                       
                                                      Flange with sleeve type joint

                                                       

                                                      Code and size Outer diameter of
                                                      armored thermocouple
                                                      Φ8 Φ6 Φ5 Φ4 Φ3 Φ2
                                                      D Φ60 Φ50
                                                      D0 Φ42 Φ36
                                                      D1 Φ24 Φ20
                                                      S Φ22 Φ19
                                                      d0 Φ9 Φ7

                                                       
                                                       
                                                      Operation temperature recommended of armored thermocouple
                                                       

                                                      Name Tube material Outer diameter Operation temperature
                                                      long term short term
                                                      NiCr-NiSi 1Cr18Ni9Ti 2.0 600 700
                                                      3.0,4.0,5.0,6.0,8.0 800 900
                                                       GH3030 2.0,3.0 800 900
                                                      4.0,5.0 900 1000
                                                      6.0,8.0 1000 1100
                                                      NiCrSi-NiSi 1Cr18Ni9Ti 2.0 600 700
                                                      3.0,4.0,5.0,6.0,8.0 800 900
                                                       GH3030 2.0,3.0 900 1000
                                                      4.0,5.0 1000 1100
                                                      6.0,8.0 1100 1200
                                                       GH3039 2.0,3.0,4.0 1000 1100
                                                      5.0,6.0,8.0 1100 1200
                                                      NiCr-CuNi 1Cr18Ni9Ti 2.0 500 600
                                                      3.0,4.0,5.0 600 700
                                                      6.0,8.0 700 800
                                                      Fe- CuNi 1Cr18Ni9Ti 2.0 400 500
                                                      3.0,4.0,5.0 500 600
                                                      6.0,8.0 600 750
                                                      Cu-CuNi 1Cr18Ni9Ti 2.0,3.0,4.0,5.0 250 300
                                                      6.0,8.0 300 2350
                                                      PtRh10-Pt  GH3039 2.0,3.0,4.0 1000 1100
                                                      5.0,6.0,8.0 1100 1200

                                                       

                                                       
                                                       
                                                      Remarks: size R should be indicated in ordering. ( diameter of tube wall or boiler wall)
                                                      Type naming method

                                                      W Temperature instrument 
                                                        R R thermocouple
                                                        Thermal element materials 
                                                      P   RtRh10-Pt
                                                      M   NiCrSi-NiSi
                                                      N   NiCr-NiSi
                                                      E    NiCr-CuNi
                                                      C   Cu-CuNi
                                                      F   Fe-CuNi
                                                        K Armored type
                                                          Filament
                                                      Blank  simplex
                                                      2 Duplex 
                                                        Mounting &fixing 
                                                      1 Without fixing device
                                                      2 threaded head with fixed fastener
                                                      3 threaded head with movable fastener
                                                      4 flange with fixed fastener
                                                      5 flange with movable fastener
                                                        junction box type
                                                      2 Anti-spray type
                                                      3 Water-proof type
                                                      6 round plug type
                                                      7 flat plug type
                                                      8 handle type
                                                      9 with compensation wire
                                                        measuring end
                                                      1 Insulation type
                                                        Attached devices
                                                      M Contacting block type
                                                           G hoop type
                                                      W R N K 2 2 3 1 M Model example

                                                       
                                                       

                                                       

                                                      Last:Without the Next:handle type armored thermocouple

                                                      Contact Us

                                                      Office Address: Room 402, No. 650, Xinzhuan Rd., Jiuting Town, Songjiang District, Shanghai, China (Mainland)

                                                      Phone:021-57635022

                                                      E-mail:info@gnflowmeter.com

                                                      E-mail:sales@gninstruments.com

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