Your Professional Thermocouples Supplier
Jiangsu Zhaolong Electric Co., Ltd., located on Zhangguo Chang'an Road, Dainan Town, Xinghua City, Taizhou City, Jiangsu Province, is a high-tech enterprise specializing in the production and R&D of switches, temperature sensors, and temperature control instruments.It has applications across the entire spectrum, including steel, chemical, various machinery and equipment, environmental protection, petroleum, industrial furnaces, ovens, heating and refrigeration equipment, etc.
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Assembled ThermocoupleThe outdoor patio post lights is a standardized temperature-sensing device renowned for its simplicity, durability, and wide applicability in industrial settings. Composed of a junction box,...view more -
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Armored ThermocoupleThe product is a high-performance temperature sensor engineered with a integrated structure—combining thermoelectrodes, insulation material, and a metal protective sleeve into a single flexible unit.view more -
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Platinum-rhodium ThermocouplesThe Platinum-rhodium thermocouple is a premium noble metal temperature sensor renowned for exceptional accuracy, high-temperature resistance, and long-term stability.view more -
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Why Choose Us
Our Certificate
Our products are ISO9001:2008 and CE certified, ensuring reliable quality and compliance with international standards.
Global Market Support
We actively serve both domestic and international customers through efficient logistics, e-commerce, and professional export services.
Advanced Production Equipment
Equipped with advanced manufacturing and testing equipment, including laser welding machines, CNC lathes, automatic thermocouple production lines, oscilloscopes, semiconductor testers, and wave soldering lines, we ensure high production efficiency, precise manufacturing, and strict quality control throughout the entire production process.
Fast Response & Reliable Support
We offer one-on-one professional consultation to provide tailored solutions based on customer requirements. During production, we strictly control quality and delivery schedules while providing real-time order updates. Our comprehensive after-sales support ensures fast response times and long-term reliable cooperation.
Types of Thermocouples
Thermocouples of Base Metals
The thermocouples of base metals are types E, T, N, J, and K etc. known as the most common categories. The material from which these thermocouples are made are inexpensive and commonly available metals such as iron, copper, and nickel etc.
Thermocouples of Refractory Metals
The thermocouples of refractory metals are the considered as the last category of thermocouples which can be manufactured. These thermocouples are created from certain exotic metals which are rare and costly as well such as Rhenium and Tungsten etc.
Advantages of Thermocouples
High Measurement Accuracy
Because the thermocouple is in direct contact with the object being measured, it is not affected by the intermediate medium.
Wide Measurement Range
Commonly used thermocouples can measure continuously from -50~+1600℃℃. Some special thermocouples can measure as low as -269℃ (such as gold, iron, nickel, chromium) and as high as +2800℃ (such as tungsten-rhenium).
Simple Structure And Easy To Use
Thermocouples are usually composed of two different metal wires, and are not limited by size and opening. They have a protective sleeve outside, which is very convenient to use.
Working Principle of Thermocouples
The working principle of thermocouples is based on the thermoelectric effect (also known as the Seebeck effect). This effect describes the phenomenon of generating an electromotive force (EMF) when two different metals are joined and exposed to different temperatures at their junctions.
Basic Principle of the Thermoelectric Effect
When two different metals or alloys, A and B, form a closed loop with their junctions at different temperatures, an EMF is generated in the loop. The magnitude of this EMF is proportional to the temperature difference between the two junctions. By measuring this EMF, the temperature can be inferred.
Structure of a Thermocouple
A typical thermocouple consists of two dissimilar metal wires joined at one end, forming a junction called the "hot junction" or "measuring junction." The other ends are connected to a reference point known as the "cold junction" or "reference junction." When the hot junction is exposed to the temperature being measured, and the cold junction is kept at a known temperature, an EMF is generated in the circuit. This EMF value can be used to determine the temperature at the hot junction.
Application of Thermocouples
Oil and Gas Industry
In the oil and gas industry, temperature measurement is critical for ensuring safety and efficiency throughout exploration, extraction, transportation, and refining processes. Thermocouples are widely used to monitor and control temperatures in refineries, natural gas processing plants, pipelines, and storage tanks.
Chemical Industry
In chemical production, many processes require precise temperature control. Thermocouples are used in reactors, distillation columns, condensers, and other equipment to monitor temperatures, ensuring smooth chemical reactions and stable product quality.
Pharmaceutical Industry
The pharmaceutical industry requires high-precision temperature control during production, storage, and transportation of drugs. Thermocouples are used in sterilization, drying, and cold chain transport processes to monitor temperatures in real-time, ensuring the quality and safety of pharmaceuticals.
Food and Beverage Industry
Temperature control in the food and beverage industry directly affects product quality and safety. Thermocouples are used in sterilization, baking, fermentation, and refrigeration processes, ensuring products are produced and stored under optimal temperature conditions.
Power Industry
In the power industry, thermocouples are used to monitor the temperatures of boilers, turbines, and generators. Accurate temperature measurement helps optimize equipment operating conditions, improving efficiency and safety.
Aerospace Industry
In the aerospace sector, thermocouples are used to monitor the temperatures of aircraft engines, spacecraft, and electronic equipment, ensuring they operate correctly in extreme environments. Temperature control is crucial for ensuring the performance and reliability of aerospace equipment and materials.
Automotive Manufacturing Industry
During automotive manufacturing, thermocouples are used to monitor the temperatures in engine testing, welding processes, and painting operations. Precise temperature control is essential for ensuring the performance and quality of automotive components.
Maintain of Thermocouples
Calibration Frequency
Thermocouple calibration will gradually decline at varying rates depending on the application. The calibration frequency should be determined by the user in each case. Heat transfer compounds are available.
Achieving Calibration
Calibration is achieved by comparing the thermocouple output with a working standard. Preferably, calibrate the thermocouple in its installed position. If the sensor is removed for calibration, it should be returned to the same location and immersion depth for maximum reliability.
Regular Inspection
Periodically inspect the thermowell and sensor sheath surfaces for corrosion or damage. If damage occurs, replacement may be considered.
Prevent Moisture Accumulation
Moisture can cause corrosion and de-calibration in some thermocouple wires (e.g., the positive leg of a J-type thermocouple is iron and rusts easily). Take care to prevent moisture buildup on thermocouple wire terminals.
FAQ
We're well-known as one of the leading thermocouples manufacturers and suppliers in China, featured by quality products and low price. Please feel free to buy customized thermocouples made in China here from our factory. Contact us for more details.
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