sales@gninstruments.com

                                                      Type:explosion-proof thermal resistance2

                                                      Illustrate: It is usually connected with display meter, recording meter and computer, etc. to directly measure temperature of liquid, vapor, gas and solid surface ranging from -200℃ to 500℃ with exploxives such as hydrocarbon on production spot.

                                                      Explosion-proof Thermal Resistance

                                                       

                                                      Application 
                                                      It is usually connected with display meter, recording meter and computer, etc. to directly measure temperature of liquid, vapor, gas and solid surface ranging from -200℃ to 500℃ with exploxives such as hydrocarbon on production spot.
                                                       
                                                      Features
                                                      Spring thermal element with good shock-proof performance;
                                                      High measuring accuracy;
                                                      No compensational wire, spare cost;
                                                      Imported film resistor with high reliability and stability

                                                       
                                                      Operation Theory
                                                      Explosion-proof thermal resistance has a junction box of enough strength with gaps inside it. All spare parts which might produce spark, electric arc, and dangerous high temperature are sealed in the junction box. When explosion within the box happens, fire and high temperature caused by explosion could be extincted and cooled. Thus, explosion separation could be realized.
                                                       
                                                      Main Technical Parameters
                                                      Executive Standard
                                                      IEC751
                                                      JB/T8622-1997
                                                      JB/T8623-1997
                                                      JB/T5518-1991
                                                       
                                                      Insulation Resistance at Normal Temperature
                                                      The insulation resistance between electrode and protection tube of the thermocouple shall be no less than 100 MΩ under condition that environment temperature is 15~35℃, relative humidity is no more than 80%, and testing voltage is D.C.10~100V.
                                                       
                                                      Measuring Range & Tolerance


                                                      Type  Graduation Measuring Range ℃ Accuracy  Tolerance
                                                      WZP Pt100 -200~+500 A ±(0.15+0.002) ltl
                                                      WZC Cu50  
                                                      Cu100
                                                      -50~+100 B ±(0.30+0.005) ltl
                                                      --- ±(0.30+0.005) ltl
                                                       
                                                      Remarks: t is absolute value actually tested with thermal sensor.

                                                      Certificates List

                                                      Explosion-proof Class Certificate No. Certifying institution 
                                                      d ⅡBT4 GYB96451 NEPSI
                                                      d ⅡBT4 GYB96452 NEPSI
                                                      d ⅡCT5 GYB98338 NEPSI
                                                      d ⅡCT5 GYB97178 NEPSI
                                                      iaⅡCT6 GYB99413 NEPSI
                                                       
                                                      Remarks: NEPSI National Explosion-Proof Security Inspection 
                                                       
                                                      Indication of Explosion-proof Function

                                                      d      Ⅱ      □     T□        
                                                               Temperature Group: T1-T6  
                                                        Explosion-proof Class: A, B, C
                                                           Electric Equipment for plant 
                                                             Explosion Separation Type 
                                                              Intrinsic Safety Type   
                                                       
                                                      Electric Equipment Category

                                                      I –Electric Equipment for Coal Mine Well 
                                                      II –Electric Equipment for Plant
                                                      Explosion-proof Class
                                                      It is divided into Class A, B, and C according to maximum test safety gap in explosive gas compound.

                                                      Category Class Max.Test Safety Gap
                                                      A 0.9≤MESG
                                                      B 0.5<MESG<0.9
                                                      C MESG≤0.5
                                                       
                                                      Temperature Group
                                                      It includes T1-T6 according to maximum surface temperature allowed of open part.

                                                      Temperature Group Max. Surface Temperature Allowed
                                                      T1 450
                                                      T2 300
                                                      T3 200
                                                      T4 135
                                                      T5 100
                                                      T6 85
                                                       
                                                      Junction Box Figure 
                                                       
                                                      Class d II BT                        Class d II CT
                                                      Terminal Figure

                                                      Type Naming Method

                                                      W Temperature Instrument
                                                        z Thermal Resistance
                                                          Thermal Element Material
                                                      P P Pt
                                                      C C Cu
                                                         
                                                       
                                                      Filament
                                                      blank Simplex  
                                                      2 Duplex
                                                       
                                                       
                                                      Mounting &fixing
                                                      1 Without fixing device
                                                      2 Threaded connector
                                                      3 Movable Flange
                                                      4 Fixed flange
                                                      5 Elbow tube connector
                                                      6 Fixed threaded Cone connector
                                                      7 Straight tube connector
                                                      8 Fixed threaded tube connector
                                                      9 Movable threaded tube connector
                                                        Junction box
                                                      4 Explosion-proof Type
                                                       
                                                       
                                                      Protection Tube Diameter
                                                          0Φ16
                                                        1Φ12
                                                        Measuring End 
                                                      G Variable cross section
                                                      W Z P 2 2 4 1 G Model example

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                                                      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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