Ningbo Leadkin Instrument Complete Sets of Equipment Co., Ltd.
Experts and innovators to solve the thermal control system
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Type: K/N/E/J/T/S/R/B
Place of Origin: Zhejiang, China (Mainland)
Accuracy: I-0.4%t, II-0.75%t, III-1.5%t
Core number: 2,3,4,6
Inorganic mineral insulating lead material: Ni, Cu
Insulator: 99.6% high purity MgO
Certificate:ISO9001, IATF16949, CE
Application: connecting with thermocouple and instrument machine
Sheath material: 0Cr18Ni10Ti, SS304S,SS316L,SS316, Cu
Sheath Dia(mm): φ3.0, φ4.0, φ6.0, φ8.0
| Product Name | Code | Type | Shaeth Material | Outside Dia. | Temperature |
| NiCr-NiSi /NiCr-NiAl | KK | K | SS304 SS316 | 0.5-1.0 | 400 |
| 1.5-3.2 | 600 | ||||
| 4.0-8.0 | 800 | ||||
| SS310 Inconel600 | 0.5-1.0 | 500 | |||
| 1.5-3.2 | 800 | ||||
| 4.0-6.4 | 900 | ||||
| 8.0-12.7 | 1000 | ||||
| NiCrSi-NiSi | NK | N | SS304 SS316 | 0.5-1.0 | 400 |
| 1.5-3.2 | 600 | ||||
| 4.0-8.0 | 800 | ||||
| SS310 Inconel600 | 0.5-1.0 | 500 | |||
| 1.5-3.2 | 800 | ||||
| 4.0-6.4 | 900 | ||||
| 8.0-12.7 | 1000 | ||||
| NiCr-Konstantan | EK | E | SS304 SS316 | 0.5-1.0 | 400 |
| 1.5-3.2 | 600 | ||||
| 4.0-8.0 | 800 | ||||
| Fe-Konstantan | JK | J | SS304 SS316 | 0.5-1.0 | 400 |
| 1.5-3.2 | 600 | ||||
| 4.0-8.0 | 800 | ||||
| Cu-Konstantan | TK | T | SS304 SS316 | 0.5-1.0 | 400 |
| 1.5-3.2 | 600 | ||||
| 4.0-8.0 | 800 | ||||
| RhPt10-Ph | SK | S | Inconel600 | 6.0-12.7 | 1100 |
Different temperature measuring media and service conditions have an impact on the service life and temperature range of armored thermocouples, the data in the table is only recommended data.
| Type | Class I | Class II | ||
| Accuracy | Temp.Range | Accuracy | Temp.Range | |
| K | ±1.5℃ | -40~375℃ | ±2.5℃ | -40~375℃ |
| ±0.4% | 375℃-1000℃ | ±0.75% | 375℃-1000℃ | |
| N | ±1.5℃ | -40~375℃ | ±2.5℃ | -40~375℃ |
| ±0.4% | 375℃-1000℃ | ±0.75% | 375℃-1000℃ | |
| E | ±1.5℃ | -40~375℃ | ±2.5℃ | -40~375℃ |
| ±0.4% | 375℃-800℃ | ±0.75% | 375℃-800℃ | |
| J | ±1.5℃ | -40~375℃ | ±2.5℃ | -40~375℃ |
| ±0.4% | 375℃-800℃ | ±0.75% | 375℃-800℃ | |
| T | ±0.5℃ | -40~125℃ | ±1.0℃ | -40~125℃ |
| ±0.4% | 125℃-350℃ | ±0.75% | 125℃-350℃ | |
| S | 0-1100℃ | ±1.0℃ | 0-1100℃ | ±1.5℃ |
Applications
Industrial: Used in furnaces, kilns, gas turbines, and other high-temperature applications.
HVAC: Employed in heating, ventilation, and air conditioning systems for temperature control.
Automotive: Used in exhaust gas temperature measurements and engine monitoring.
Food Industry: Monitors temperatures in cooking and processing environments.
Advantages and Disadvantages
Advantages:
Wide temperature range.
Simple construction and robust design.
Fast response time and ease of use.
Disadvantages:
Limited accuracy compared to other sensors like RTDs.
Non-linear output requires compensation.
Susceptible to electromagnetic interference.
Safety and Handling
Thermal Shock: Avoid rapid temperature changes to prevent damage.
Corrosive Environments: Use appropriate materials to prevent degradation.
Handling: Handle with care to avoid mechanical damage to junctions and wires.
Maintenance
Regularly inspect and calibrate to ensure accurate readings.
Clean the junction area if contamination is suspected.
Conclusion
Thermocouples are versatile temperature sensors suitable for a wide range of applications. Understanding their operation, types, construction, and proper handling is crucial for effective use in both industrial and laboratory settings.
Insulation:
Insulating materials (like ceramic or fiberglass) are often used to protect the thermocouple wires from environmental influences and prevent electrical interference.
Sheath:
A protective outer layer, typically made of stainless steel or Inconel, encases the thermocouple to protect it from harsh environments, mechanical damage, and chemical exposure.
Termination Head:
At the non-junction end, the thermocouple wires are connected to a terminal block for easy attachment to measurement instruments.
Working Principle
The thermocouple operates based on the Seebeck effect, which states that a voltage (thermoelectric voltage) is generated when there is a temperature difference between the hot junction (where the two metals meet) and the cold junction (reference point).
The voltage generated is measured in millivolts and is related to the temperature difference between the junctions according to specific calibration tables (NIST tables) for each type of thermocouple.
We add heat shrink tubing and plastic film to make sure high insulated resistance.
Except marking notes, we also have pass card and test report for every coil cable.
We have high - quality professional products, as well as advanced product lines and equipments. All of the products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world.Along the increasing market demands, we continuously satisfy customers by updating products to improve prouduction systems, improve quality.
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