As a sensor for measuring temperature, industrial assembled thermocouples are usually used in conjunction with display instruments, recording instruments and electronic regulators. It can directly measure the surface temperature of liquid, steam and gas media as well as solids in various production processes ranging from 0℃ to 1800℃.
We Sino-Inst produce and supply platinum-rhodium 30-platinum-rhodium 6, platinum-rhodium 10-platinum, nickel-chromium-nickel-chromium, nickel-chromium-copper-nickel, copper-copper-nickel, iron-copper-nickel in accordance with IEC national standard graduation numbers Other types of thermocouples.
Note:The brackets mark is generally not recommended,If ordering please contact the company!
Thermal response time: When there is a step change in temperature, the time required for the output of the thermocouple to change to equal to 50% of the change is called the thermal response time, represented by T0.5.
Thermocouple nominal pressure: Generally refers to the static external pressure that the protective tube can withstand at room temperature without rupture. In fact, the allowable working pressure is not only related to the protective tube material, diameter and wall thickness. It is also related to its structural form, installation method, insertion depth, and the flow rate and type of the measured medium.
The minimum insertion depth of the thermocouple: should be no less than 8 to 10 times the outer diameter of the protective tube (except for special products).
The test voltage of insulation resistance at room temperature is DC 500V±50V. The atmospheric conditions for measuring insulation resistance at room temperature are temperature 15~35℃, relative humidity 45%, and atmospheric pressure 86~106kPa.
For thermocouples with a length exceeding 1 meter, the product of its normal temperature insulation resistance value and its length should not be less than 100MΩ.m; That is, Rr.L≥100 MΩ.m, L>1m. Where: Rr-the length of the thermocouple m.
For thermocouples with a length equal to or less than 1 meter, its insulation resistance value at room temperature should not be less than 100 MΩ.
Upper limit temperature insulation resistance:
Upper limit temperature tm ℃
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 tm＞1300
t=1300
0.02
Protection Tube
Protection tube material
Long term temperature ℃
Short term temperature ℃
CT1 Corundum
1600
1800
CT2 High alumina
1300
1600
Nickel base Wrought Superalloys 3YC52
1300
1350
Nickel base Wrought Superalloys GH3039
1250
1320
Nickel base superalloy GH3030
1200
1250
Heat resistant stainless steel 2Cr25Ni20
1200
1250
Silicon carbide
1100
1150
Stainless steel 316L
900
950
Stainless steel 1Cr18Ni9Ti
800
900
Order Guide
W
Temperature instrument
R
Thermocouple
R
Platinum rhodium 30—Platinum rhodium 6
Temperature measuring element material
Q
Platinum rhodium 13—Platinum
P
Platinum rhodium 10—Platinum
M
Nickel chromium silicon—Nickel silicon magnesium
N
Nickel chromium—Nickel silicon
E
Nickel chromium—Copper nickel
F
Iron —constantan
C
Copper —Copper nickel
1
Single
Temperature sensor options
2
Double branch
0
No protection tube
Fixed form
1
No fixed device
2
Fixing screw
3
Movable flange
4
Fixed flange
5
Rectangular movable flange
6
Fixed thread taper protection tube
1
No terminal box(components)
Connection box
2
All stainless stee
3
Waterproof type
4
Explosion proof type
0
φ16mm
Design sequence
1
φ25mm Double-deck
2
φ16mm High alumina
3
φ20mm High alumina
W R N— 2 3 0 (example)
Industrial Assembled Thermocouples Types
Porcelain bushing couple wire core
Armoring core
Non fixture type
Non fixture type(ceramic and corundum protective tube)
Non fixture type(Silicon carbide protective tube)
Fixed thread type
Fixed thread type(ceramic and corundum protective tube)
Movable flange type
Fixed flange type
Movable flange right angle type
Movable flange right angle type(Silicon carbide protective tube)
Conical protective tube fixed thread type
The difference between fabricated thermocouples and Sheathed Thermocouples
Both fabricated and armored thermocouples are sensors that measure temperature.
The assembled thermocouple is composed of thermocouple core, insulation layer, metal protection tube and connector. A thermocouple core consists of interlaced wires of two different materials. At the junction of two metals, the thermoelectric effect caused by the temperature difference is called thermoelectromotive force, and the magnitude of thermoelectromotive force is proportional to the temperature difference.
Armored thermocouples are formed by encasing the thermocouple core in a metal sleeve (armored tube) and sealing it. Armored tubes can play a protective role.
Response time: The response time of armored thermocouples is slower.
Usage scenarios: Assembled thermocouples are suitable for measurements within a general temperature range, while armored thermocouples are suitable for measurements that require higher accuracy, a larger measurement range, and high-temperature environments.
Cost: The cost of armored thermocouples is higher.
When selecting a thermocouple, the main factors to consider include temperature range, measurement accuracy, response time, interference immunity, reliability and cost.
For occasions where temperature in high temperature environments needs to be measured and accuracy is required, armored thermocouples can be selected; For temperature measurement under normal circumstances, it is enough to choose an assembled thermocouple.
More Featured Temperature Sensors and Measurement Solutions
Assembled industrial thermocouples can directly measure the temperature in various production processes. As a sensor for measuring temperature, its scale and tolerance are suitable for detachable industrial thermocouples. They are usually used in conjunction with display instruments, recording instruments or computers. .
Our Sino-Inst produces assembled industrial thermocouples and thermal resistors such as B, R, S, K, E, J, T, N and Pt100 that comply with industry standards and IEC standard graduation numbers. The measured temperature range is -40~1600 ℃. Depending on the operating temperature, the wire diameter can be selected and customized from Φ0.2mm to Φ3.2mm.
If you need to purchase Industrial Assembled Thermocouples or have related technical questions, please feel free to contact us.
Zhang Wei, possesses 20 years of experience as an automation instrumentation engineer, specializing in the research, design, installation, commissioning, and maintenance of automation instruments.
Face to various instrument communication protocols (such as Modbus, Profibus, etc.), with solid hardware circuit design and software programming skills (proficient in C language and PLC programming). Has extensive project experience; projects he has led and participated in have all achieved outstanding results, improving product accuracy, reducing costs, and increasing production efficiency.
Possesses excellent communication and coordination skills and a strong team spirit, enabling him to quickly respond to customer needs and provide high-quality automation instrumentation solutions.
As a sensor for measuring temperature, industrial assembled thermocouples are usually used in conjunction with display instruments, recording instruments and electronic regulators. It can directly measure the surface temperature of liquid, steam and gas media as well as solids in various production processes ranging from 0℃ to 1800℃.
