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Thermocouple is a type of temperature sensor that consists of two dissimilar metal wires joined at one end, called the junction. When the junction is exposed to a temperature difference, a voltage is generated that is proportional to the temperature difference. This voltage can be measured and used to calculate the temperature.
Thermocouples are commonly used in industrial applications for temperature measurement, such as in furnaces, ovens, and other high-temperature processes. They are also used in scientific research and in household appliances like stoves and grills.
There are many different types of thermocouples, each made from a different combination of metals, with different temperature ranges and accuracies. Common types include J, K, T, and E, with J and K being the most commonly used. The choice of thermocouple type depends on the application requirements, including temperature range, accuracy, and environment.
| Thermocouple | Length | Insertion Depth | Graduation | Thermometric | Specification | Thermal response | |
| category | 300 | 150 | mark | scope | Diam(mm) | Protection tube material | Time T (s) |
| Single | 350 | 200 | S/ R /B/ K | 0~1800C | Φ16 | Corundum material | <150 |
| Pt Rh30-Pt Rh6 | 400 | 250 | Φ25 | <360 | |||
| Double | 450 | 300 | Φ16 | <150 | |||
| PtRh 30-Pt Rh6 | 550 | 400 | Φ25 | <360 | |||
| single Pt Rh 10-Pt | 650 | 500 | Φ16 | <150 | |||
| 900 | 750 | Φ25 | <360 | ||||
| Double Pt Rh10-Pt | 1150 | 1000 | Φ16 | <150 | |||
| 1250 | 1100 | Φ25 | <360 | ||||
Types of Thermocouples
Thermocouples are classified by the types of metals used, which determine their temperature range, accuracy, and application suitability. Common types include:
| Type | Materials | Temperature Range | Applications |
|---|---|---|---|
| Type K | Chromel (Ni-Cr) / Alumel (Ni-Al) | -200°C to 1260°C (-328°F to 2300°F) | General-purpose, industrial, and laboratory use. |
| Type J | Iron / Constantan (Cu-Ni) | -40°C to 750°C (-40°F to 1382°F) | Older equipment, limited oxygen environments. |
| Type T | Copper / Constantan (Cu-Ni) | -200°C to 350°C (-328°F to 662°F) | Low-temperature applications, cryogenics. |
| Type E | Chromel (Ni-Cr) / Constantan (Cu-Ni) | -200°C to 900°C (-328°F to 1652°F) | High-output, low-temperature applications. |
| Type N | Nicrosil (Ni-Cr-Si) / Nisil (Ni-Si-Mg) | -270°C to 1300°C (-454°F to 2372°F) | High-temperature applications,Type K. |
| Type S | Platinum-Rhodium (Pt-Rh) | 0°C to 1450°C (32°F to 2642°F) | High-temperature applications (e.g., furnaces). |
| Type R | Platinum-Rhodium (Pt-Rh) | 0°C to 1450°C (32°F to 2642°F) | Similar to Type S, but with slightly different composition. |
| Type B | Platinum-Rhodium (Pt-Rh) | 0°C to 1700°C (32°F to 3092°F) | Extremely high-temperature applications. |
Product Advantage
1:High temperature resistant ceramic base ,99% corundum tube
2: imported chip ,Micro Welding Technology
3: the installation method can be customized,degrees fast response speed the installation
4. High accuracy,High quality temperature measuring wire
Choosing the Right Thermocouple
When selecting a thermocouple, consider:
Temperature Range: Ensure the thermocouple type matches your required range.
Environment: Consider factors like chemical exposure, vibration, and moisture.
Accuracy: Choose a type that meets your precision requirements.
Response Time: Faster response times are needed for dynamic temperature changes.
Probe Design: Select the appropriate probe style (e.g., bare wire, sheathed, or enclosed).
Applications of Thermocouples
Industrial Processes:
Monitoring temperatures in furnaces, kilns, and reactors.
Controlling temperatures in manufacturing processes.
HVAC Systems:
Measuring air and fluid temperatures in heating and cooling systems.
Automotive:
Monitoring exhaust gas temperatures (EGT) and engine temperatures.
Food Industry:
Ensuring proper temperatures during cooking, storage, and processing.
Scientific Research:
Used in laboratories for precise temperature measurements.
Aerospace:
Monitoring temperatures in engines and other critical systems.
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You may contact any one of our sales and services team: email to us as inquiry.
