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Wrnk, wrek, wrck armored thermocouple




Product Name: wrnk, wrek, wrck armored thermocouple
Product No.: 14757-682
Product model: wrnk, wrek, wrck
Updated on: September 19, 2009
Manufacturer: thermocouple, thermal resistance, bimetal thermometer, polytetrafluoroethylene, PTFE gasket -- Shanghai Feilong instrument and Electrical Co., Ltd
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Product details


Summary
Armored thermocouple has many advantages, such as being able to bend, resistant to high pressure, fast thermal response time and durable. Like the industrial assembled thermocouple, it is used as a transmitter for measuring temperature, usually in combination with the display instrument, recording instrument and electronic regulator, and also as a temperature sensing element of the assembled thermocouple. It can directly measure the temperature of liquid, steam, gas medium and solid surface in the range of 0 ~ 800 ℃.
principle
The working principle of armored thermocouple is that the two ends of two different components of conductor are welded to form a circuit, and the direct temperature measuring end is called the working end, and the terminal end is called the cold end, also known as the reference end. When there is a temperature difference between the working end and the reference end, a thermal current will be generated in the circuit. When the display instrument is connected, the corresponding temperature value of the thermoelectric EMF generated by the thermocouple will be indicated on the instrument.
The thermoelectric force of the armored thermocouple will increase with the temperature of the measuring end. The thermoelectric force is only related to the material of the thermocouple conductor and the temperature difference between the two ends, and has nothing to do with the length and diameter of the thermoelectric pole.
The structure principle of armored thermocouple is that it is made of conductor, high insulating magnesium oxide and 1Cr18Ni9Ti stainless steel protective tube, which has been pulled together for many times. Armored thermocouple products are mainly composed of junction box, terminal and armored thermocouple, and equipped with various installation and fixing devices.
Armored thermocouple is divided into two types: insulation type and shell type.
Basic technical indicators


Note: 1. T is the absolute value of the measured temperature


2. T-type graduation products need to be ordered through consultation with the manufacturer


Thermal response time of armored thermocouple


In case of step change of temperature, the time when the output of thermocouple changes to 50% of the step change is called thermal response time, which is expressed by τ 0.5.


insulation resistance


When the ambient air temperature is 20 ± 1.5 ℃ and the relative humidity is not more than 80%, the insulation resistance between the coupling wire of insulated armored thermocouple and the outer sleeve shall meet the requirements of the following table.


Deflection


The radius of flexible curvature of armored thermocouple shall not be less than 5 times of its outer diameter.


Thermal response time of armored thermocouple


Standard Specification for outside diameter and nominal length of armored thermocouple


Outer diameter of armored thermocouple D (mm)
φ 8 φ 6 φ 5 φ 4 φ 3
50 50 50 50 50
75 75 75 75 75
100 100 100 100 100
150 150 150 150 150
200 200 200 200 200
250 250 250 250 250
300 300 300 300 300
400 400 400 400 400
500 500 500 500 500
750 750 750 750 750
1000 1000 1000 1000 1000
  1250 1250 1250 1250
  1500 1500 1500 1500
  2000 2000 2000 2000
    2500 2500 2500
    3000 3000 3000
    4000 4000 4000
      5000 5000
      7500 7500
      10000 10000
        15000
Note: the nominal total length L of 1 ¢ 3 insulated armored thermocouple shall not be greater than 10000mm.


2. The outer diameter of armored thermocouple is d < 5mm, and there is splash proof or waterproof junction box. Users should pay attention to that when installing the thermocouple, the exposed part of the equipment must be equipped with support and other auxiliary supports to increase the rigidity, ensure the firmness, prevent the junction box from shaking back and forth, and damage the thermocouple.


structure


Structure form of armored thermocouple material


Structure form of working end (hot end)


Installation and fixation form


The fixture is for user installation. In addition to the products without fixed device, the armored thermocouple fixed device has four structural forms: fixed ferrule type, movable ferrule type, fixed flange and movable flange. The fixed ferrule type is used for the user to fix in a short time, and the movable ferrule type user can fix for many times.

Note: the numbers in brackets are generally not used as specifications. If special specifications are needed, order.


Free end (junction box) type of armored thermocouple


The junction box is used to connect the free end of the thermocouple and the display instrument. At present, there are many types of structures, such as simple type, splash proof type, waterproof type, handle type, small junction box type and compensation conductor type.


With compensating conductor


Splash proof


Waterproof type


Handle type


Small junction box type


Armored thermocouple (2)

Armored thermocouple without fixture
Name Model Graduation Working end form
Single nickel chromium constantan WREK-101  E Insulation type
WREK-121
WREK-131
WREK-181
WREK-187 
WREK-191
WREK-102 Shell type
WREK-122 
WREK-132 
WREK-182 
WREK-188 
WREK-192
Double nickel chromium constantan WREK 2-121  Insulation type
WREK 2-131
WREK 2-122  Shell type
WREK 2-132
Single nickel chromium nickel silicon WRNK-101 K Insulation type
WRNK-121 
WRNK-131 
WRNK-181 
WRNK-191 
WRNK-187 
WRNK-102  Shell type
WRNK-122 
WRNK-132 
WRNK-182 
WRNK-188 
WRNK-192 
Double nickel chromium constantan WRNK 2 -121  Insulation type
WRNK 2 -131 
WRNK 2 -122  Shell type
WRNK 2 -132 
Single copper constantan WRCK-101  T Insulation type
WRCK-121 
WRCK-131 
WRCK-181 
WRCK-191 
WRCK-187 
WRCK-102  Shell type
WRCK-122 
WRCK-132 
WRCK-182 
WRCK-188 
WRCK-192 
Double copper constantan WRCK 2-121  Insulation type
WRCK 2-131 
WRCK 2-122  Shell type
WRCK 2-132 
Note: outer diameter of casing D (mm): ¢ 3, ¢ 4, ¢ 5, ¢ 6, ¢ 8


Fixed ferrule threaded device armored thermocouple
Name Model Graduation Working end form
Single nickel chromium constantan WREK-201  E Insulation type
WREK-221 
WREK-231 
WREK-281 
WREK-291 
WREK-202  Shell type
WREK-222 
WREK-232 
WREK-282 
WREK-292 
Double nickel chromium constantan WREK 2 -221  Insulation type
WREK 2 -231 
WREK 2 -222  Shell type
WREK 2 -232 
Single nickel chromium nickel silicon WRNK-201  K Insulation type
WRNK-221 
WRNK-231 
WRNK-281 
WRNK-291 
WRNK-202  Shell type
WRNK-222 
WRNK-232 
WRNK-282 
WRNK-292 
Double nickel chromium constantan WRNK 2 -221  Insulation type
WRNK 2 -231 
WRNK 2 -222  Shell type
WRNK 2 -232 
Single copper constantan WRCK-201  T Insulation type
WRCK-221 
WRCK-231 
WRCK-281 
WRCK-291 
WRCK-202  Shell type
WRCK-222 
WRCK-232 
WRCK-282 
WRCK-292 
Double copper constantan WRCK 2-221  Insulation type
WRCK 2-231 
WRCK 2-222  Shell type
WRCK 2-232 
 Note: casing outer diameter D (mm): φ 3, φ 4, φ 5, φ 6, φ 8.

Movable ferrule thread device armored thermocouple

Name Model Graduation Working end form
Single nickel chromium constantan WREK-301 E Insulation type
WREK-321
WREK-331
WREK-391
WREK-381
WREK-387 #
WREK-302 Shell type
WREK-322
WREK-332
WREK-392
WREK-382
WREK-388 #
Double nickel chromium constantan WREK 2-321 Insulation type
WREK 2-331
WREK 2-322 Shell type
WREK 2-332
Single nickel chromium nickel silicon WRNK-301 K Insulation type
WRNK-321
WRNK-331
WRNK-391
WRNK-381
WRNK-387 #
WRNK-302 Shell type
WRNK-322
WRNK-332
WRNK-392
WRNK-382
WRNK-388
Double nickel chromium nickel silicon WRNK 2-321 Insulation type
WRNK 2-331
WRNK 2-322 Shell type
WRNK 2-332
Single copper constantan WRCK-301 T Insulation type
WRCK-321
WRCK-331
WRCK-381
WRCK-391
WRCK-387 #
WRCK-302 Shell type
WRCK-322
WRCK-332
WRCK-382
WRCK-392
WRCK-388 #
Double copper constantan WRCK 2-321 Insulation type
WRCK 2-331
WRCK 2-322 Shell type
WRCK 2-332
Note: casing outer diameter D (mm): φ 3, φ 4, φ 5, φ 6, φ 8.


The outer diameter of the casing with "Chen" type 387 and 388 is φ 3 and φ 4mm


Fixed ferrule flange mounted armored thermocouple
Name Model Graduation Working end form
Single nickel chromium constantan WREK-401  E Insulation type
WREK-421 
WREK-431 
WREK-481 
WREK-491 
WREK-402  Shell type
WREK-422 
WREK-432 
WREK-482 
WREK-492 
Double nickel chromium constantan WREK 2-421  Insulation type
WREK 2-431 
WREK 2-422  Shell type
WREK 2-432 
Single nickel chromium nickel silicon WRNK-401  K Insulation type
WRNK-421 
WRNK-431 
WRNK-481 
WRNK-491 
WRNK-402  Shell type
WRNK-422 
WRNK-432 
WRNK-482 
WRNK-492 
Double nickel chromium nickel silicon WRNK 2-421  Insulation type
WRNK 2-431 
WRNK 2-422  Shell type
WRNK 2-432 
Single copper constantan WRCK-401  T Insulation type
WRCK-421 
WRCK-431 
WRCK-481 
WRCK-491 
WRCK-402  Shell type
WRCK-422 
WRCK-432 
WRCK-482 
WRCK-492 
Double copper constantan WRCK 2-421  Insulation type
WRCK 2-431 
WRCK 2-422 Shell type
WRCK 2-432 
Note: casing outer diameter D (mm): φ 3, φ 4, φ 5, φ 6, φ 8.


Movable ferrule flange mounted armored thermocouple
Name Model Graduation Working end form
Single nickel chromium constantan WREK-501  E Insulation type
WREK-521 
WREK-531 
WREK-581 
WREK-591 
WREK-502  Shell type
WREK-522 
WREK-532 
WREK-582 
WREK-592 
Double nickel chromium constantan WREK 2-521  Insulation type
WREK 2-531 
WREK 2-522  Shell type
WREK 2-532 
Single nickel chromium nickel silicon WRNK-501  K Insulation type
WRNK-521 
WRNK-531 
WRNK-581 
WRNK-591 
WRNK-502  Shell type
WRNK-522 
WRNK-532 
WRNK-582 
WRNK-592 
Double nickel chromium nickel silicon WRNK 2-521  Insulation type
WRNK 2-531 
WRNK 2-522  Shell type
WRNK 2-532 
Single copper constantan WRCK-501  T Insulation type
WRCK-521 
WRCK-531 
WRCK-581 
WRCK-591 
WRCK-502  Shell type
WRCK-522 
WRCK-532 
WRCK-582 
WRCK-592 
Double copper constantan WRCK 2-521  Insulation type
WRCK 2-531 
WRCK 2-522  Shell type
WRCK 2-532 
Note: casing outer diameter D (mm): φ 3, φ 4, φ 5, φ 6, φ 8.





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