Sheathed Thermocouples are a solid combination made of thermocouple wire, insulating material and metal protective sleeves and then stretched. Armored thermocouples have many advantages such as being able to bend, withstand high pressure, have fast thermal response time, and are strong and durable. K type Sheathed Thermocouples can generally measure gas, liquid, steam and solid surface or internal temperatures in the range of 0 to 1300°C.
Sheathed Thermocouples, like industrial fabricated thermocouples, serve as sensors for measuring temperature and are usually used in conjunction with display instruments, PLCs, recording instruments and electronic regulators. At the same time, it can also be used as a temperature sensing element of an assembled thermocouple.
K Type Industrial Sheathed Thermocouples technical parameters
1.Sheathed Thermocouples casing diameter (mm): φ1, φ1.5, φ2, φ3, φ4, φ5, φ6, φ8;
2.Material: 304, 316L, 310S, GH3030, GH3039;
3.Temperature measurement range and accuracy:
| Type | Type of sensing element | Sheath diameter mm | Commonly used temperature ℃ | Recommended maximum operating temperature ℃ | Allowable deviation | |
| Measuring range ℃ | Tolerance value | |||||
| Platinum Rhodium 10-Platinum | S | ≥Φ3 | 1100℃ | 1300℃ | 0~1300℃ | ±2.5℃ or ±0.75%t |
| Nickel Chromium-Copper Nickel | E | ≥Φ3 | 600℃ | 700℃ | 0~700℃ | ±2.5℃ or ±0.75%t |
| Nickel chromium-nickel silicon | K | ≥Φ3 | 800℃ | 950℃ | 0~900℃ | ±2.5℃ or ±0.75%t |
| Copper-Copper Nickel | T | ≥Φ3 | 350℃ | 400℃ | <-200℃ | ±1.0℃ or ±0.75%t |
| -40~350℃ | ||||||
| Iron-Copper Nickel | J | ≥Φ3 | 500℃ | 600℃ | 0~600℃ | Not specified |
4.Thermal response time of armored thermocouple:
When there is a step change in temperature, the time required for the output of the thermocouple to change to 50% of the step change is called the thermal response time, represented by T0.5.
The thermal response time of the armored thermocouple shall not be greater than the requirements in the following table:
| Thermal response time T0.5S | Shell type | Insulated type |
| Sheath diameter (mm) | ||
| 2 | 0.4 | 0.5 |
| 3 | 0.6 | 1.2 |
| 4 | 0.8 | 2.5 |
| 5 | 1.2 | 4 |
| 6 | 2 | 6 |
| 8 | 4 | 8 |
Sheathed Thermocouple working Principle
The working principle of the armored thermocouple: The two ends of two conductors with different compositions are welded to form a loop. The direct temperature measurement end is called the measuring end, and the connecting end is called the reference end. When there is a temperature difference between the measuring end and the reference end, a corresponding temperature value of the thermoelectromotive force will be generated in the loop.
The thermal electromotive force of the armored thermocouple will increase as the temperature of the measuring end increases. The size of the thermal electromotive force is only related to the material of the armored thermocouple conductor and the temperature difference between the two ends, and has nothing to do with the length and diameter of the thermocouple.
The structure of the armored thermocouple is made of conductors, insulating magnesium oxide and 1C18N9Ti stainless steel protective tubes that are drawn multiple times. The armored thermocouple products mainly consist of a junction box, terminal blocks and an armored thermocouple. The basic structure is composed of Composed of various installation fixtures.
Sheathed thermocouple wire structure
Thermocouple wire has two types: single branch and double branch.
Different types of Industrial Sheathed Thermocouples by installation
Customized Sheathed Thermocouples:
Order Guide
| Model | illustrate | |||||||||
| W | Thermometers | |||||||||
| R | Thermocouple | |||||||||
| P | Temperature sensing element material | P Platinum Rhodium 10-Platinum | ||||||||
| M | Nickel chromium silicon – nickel silicon | |||||||||
| N | Nickel chromium-nickel silicon | |||||||||
| E | Nickel chromium-copper nickel | |||||||||
| C | Copper-Copper Nickel | |||||||||
| F | Iron-Constantan | |||||||||
| K | Armored | |||||||||
| 1 | Temperature measuring element options | Single | ||||||||
| 2 | double branch | |||||||||
| 1 | Installation fixed form | No fixtures | ||||||||
| 2 | Fixed ferrule thread | |||||||||
| 3 | Movable card sleeve thread | |||||||||
| 4 | Fixed ferrule flange | |||||||||
| 5 | Movable card sleeve flange | |||||||||
| 0 | Junction box form | No junction box | ||||||||
| 2 | splash proof | |||||||||
| 3 | Waterproof | |||||||||
| 4 | Explosion-proof | |||||||||
| 6 | Round plug type | |||||||||
| 7 | Flat plug type | |||||||||
| 8 | handle type | |||||||||
| 9 | Compensation wire type | |||||||||
| 1 | Working end form | Insulated type | ||||||||
| 2 | Shell type | |||||||||
| 3 | Open end type | |||||||||
| W | Additional devices | Hygienic chuck connection | ||||||||
| J | With heat collecting block (for measuring furnace walls) | |||||||||
More Featured Temperature Sensors and Measurement Solutions
Industrial K Type Sheathed Thermocouples are used as temperature measurement sensors and are usually used in conjunction with temperature transmitters, regulators and display instruments. Make up a process control system. It is used to directly measure or control the temperature of fluids, steam and gas media as well as solid surfaces in the range of 0-1300°C in various production processes.
Industrial Sheathed Thermocouples can be made very thin to solve temperature measurement problems in small and narrow places. They also have the advantages of shock resistance, bendability, extra length, short thermal response time, and high sensitivity. They are widely used in electric power, petrochemical, metallurgy, aerospace, food and other engineering projects. are widely used.
We at Sino-Inst supply more than 20 kinds of Industrial K Type Sheathed Thermocouples. If you need to purchase or have related technical questions, please feel free to contact us!
Industrial Sheathed Thermocouples- K Type | Product List
Sheathed Thermocouples are a solid combination made of thermocouple wire, insulating material and metal protective sleeves and then stretched. Armored thermocouples have many advantages such as being able to bend, withstand high pressure, have fast thermal response time, and are strong and durable. K type Sheathed Thermocouples can generally measure gas, liquid, steam and solid surface or internal temperatures in the range of 0 to 1300°C.
Product SKU: Industrial Sheathed Thermocouples | K Type
Product Brand: Sino-Inst
Product Currency: USD
Product Price: 30
Price Valid Until: 2029-09-09
Product In-Stock: InStock
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