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Non-fixed Assembly-type Thermocouple WRN-120,WRN-130,WRN-131

The industrial assembly-type thermocouple is used as a sensor to measure temperature, usually matched with display instruments, recording meter and electronic computer. It can directly measure temperature from 0oC to 1300oC of liquid, vapor, gas medium and solid surface during various production processes...

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Product Details

WRN series assembly-type thermocouple

Brief Description

The industrial assembly-type thermocouple is used as a sensor to measure  temperature, usually matched with display instruments, recording meter and electronic  computer. It can directly measure temperature from 0oC to 1300oC  of liquid, vapor, gas medium and solid surface during various production  processes. In addition, the device has the advantages of simple assembly,  convenient replacement, pressure spring type temperature sensing element, good  anti-vibration, wide measuring range, high mechanical strength, good  pressure durability.

Working principle
Thermocouple working principle: two conductors with different components are welded at both  ends to form a loop, measuring temperature directly side is called measurement  side, terminal side is called reference side. When the temperature between  measurement side and reference side has a difference, it will generate heat in  the loop current, then connected to the display instrument, And the instrument  indicates the corresponding temperature value of the thermal electromotive  force generated by the thermocouple. Thermocouple thermoelectric EMF will grow  with the measurement temperature’s growth, The size of the thermal  electromotive force is related to the temperature of both ends. It has nothing  to do with the length, diameter of the thermode.
 Junction  box, protective tube, insulated casing, termals and thermal electodes form a  basic structure of assembly-type thermocouple, with a variety of installation  of fixtures.

Main technical parameter
Temperature measurement range and tolerance

Thermocouple type

Code

Graduation

Measurement range℃

tolerance△t ℃

Nickel chromium nickel silicon

WRN

K

0~1300

±2.5℃ or ±0.75%│t│

Thermal response time
When  the temperature appear step change, the thermocouple output variation is to the equivalent of 50% of the change, The time required is called the thermal  response time “T0.5”  

The nominal pressure of the thermocouple
Generally  speaking, it is the static outside pressure which the protection tube can  withstand without being broken in the room temperature. In fact, allowing  working pressure is not only related to the protection tube material, the  diameter and wall thickness, it is also related to its structure, the  installation method, the into depth, the measured flow rate to its structure, the installation method, the into depth, the measured flow rate and the type of  media.
The  test voltage of the insulation resistance in room temperature is DC 500V±50V, The atmospheric  conditions of measuring at the room temperature insulation resistance is 15~35℃, relative humidity is  45% and atm pressure is 86~106kPa,

For thermocouples that is longer than 1 meters, the product of the resistance value  at ambient-temperature and its length should be not less than 100.
Can be expressed as: Rr. L≧100MΩ.ML>1m
Rr here means the insulation resistance value of the thermocouple at  ambient-temperature, the unit is MΩ.
For thermocouple of which the length is equal to/less than 1m small, its ambient  temperature insulation resistance value shall not be less than 100MΩ.
Upper-limit temperature of the insulation resistance
The upper-limit temperature of the isulation resistance for thermocouple should not  be less than the following provisons:

Upper-limit temperature℃

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

Model

WR

Thermocouple

Content

 

Code

Heat probe type

R

Pt-Rh30- Pt-Rh6

P

Pt-Rh 10-Pt

N

Nickel chromium-nickel silicon

M

Nickel chromium nickel silicon - silicon

E

Nickel chromium - nickel copper

C

Copper - Copper - Nickel

F

Iron copper nickel

 

Code

Output signal number

None
     2

single
     double

Code

Fixed device form

 

1
     2
     3
     4
     5
     6
     7

Without fixed device
     Fixed threaded
     Movable flange
     Fixed flange
     Movable flange square
     Fixed thread conical
     Straight pipe joint type

Code

Terminal type

2
     3
     4

Splash proof
     Waterproof type
     Explosion proof type

 

Code

Protection tube diameter

0

Φ16mm

1

Φ25mm

2

Φ16mm

3

Φ20mm

If the non-fixed assembly-type thermocouple wrn-120,wrn-130,wrn-131 for sale caters to your requirement, welcome to buy with us. As one of the leading such manufacturers and suppliers in China, we will offer you cheap price and excellent services.

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