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
Views:
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. |
