High temp industrial furnace thermocouple temperature sensor

An electrical device for high-temperature laboratory furnaces, a thermocouple, also known as a temperature sensor, gauges a wide range of temperature changes. Two different electrical conductors form electrical junctions to produce a voltage at a single junction. This causes a thermoelectric effect to interpret varying measurements of temperatures.

Several types of thermocouples exist as some applications require a certain type of thermocouple. For commercial and industrial applications, Sentro Tech offers the following thermocouples:

Type K, Type S, dan Type R Thermocouple untuk Industri

Thermocouple merupakan sensor temperatur yang banyak digunakan pada sistem pemanasan industri seperti boiler, burner, furnace, oven, thermal oil heater, dryer, dan industrial heating system.

Tiga tipe thermocouple yang umum digunakan adalah Type K, Type S, dan Type R. Masing-masing memiliki karakteristik temperatur dan material yang berbeda sehingga pemilihannya harus disesuaikan dengan kondisi proses.

Type K Thermocouple

Type K thermocouple merupakan salah satu thermocouple yang paling banyak digunakan pada aplikasi industri. Sensor ini memiliki rentang pengukuran yang luas dan cocok untuk berbagai aplikasi temperatur tinggi.

Type K menggunakan kombinasi material Nickel-Chromium (NiCr) dan Nickel-Aluminium (NiAl).

Karakteristik umum Type K:

• Rentang temperatur sekitar -200°C hingga +1.260°C
• Cocok untuk aplikasi temperatur tinggi
• Baik digunakan pada atmosfer oksidasi
• Banyak digunakan pada furnace, oven, burner dan industrial heater
• Relatif ekonomis dan mudah diperoleh
• Tersedia dalam berbagai bentuk probe dan mounting

Type K sangat cocok untuk aplikasi industri yang membutuhkan pengukuran temperatur umum hingga temperatur tinggi.

Aplikasi Type K

Type K dapat digunakan pada:

• Industrial oven
• Furnace
• Boiler
• Burner
• Rotary dryer
• Thermal oil heater
• Heat treatment
• Exhaust gas temperature
• Air duct temperature
• Process heating

Type S Thermocouple

Type S thermocouple menggunakan kombinasi Platinum-Rhodium / Platinum dan dikenal sebagai thermocouple untuk pengukuran temperatur tinggi dengan stabilitas yang baik.

Type S banyak digunakan pada aplikasi yang membutuhkan pengukuran temperatur tinggi dan kestabilan jangka panjang.

Karakteristik umum:

• Rentang temperatur hingga sekitar +1.600°C
• Stabil untuk temperatur tinggi
• Material berbasis platinum
• Cocok untuk furnace dan heat treatment
• Lebih mahal dibandingkan Type K

Aplikasi Type S

Type S sering digunakan pada:

• High-temperature furnace
• Kiln
• Ceramic industry
• Heat treatment
• Laboratory furnace
• Metal processing
• Industrial high-temperature process

Type R Thermocouple

Type R thermocouple juga menggunakan kombinasi Platinum-Rhodium / Platinum dan dirancang untuk pengukuran temperatur tinggi.

Type R memiliki karakteristik yang mirip dengan Type S, tetapi komposisi rhodium pada thermoelement berbeda.

Karakteristik umum:

• Rentang temperatur tinggi
• Stabil pada aplikasi temperatur tinggi
• Berbasis platinum
• Cocok untuk furnace dan high-temperature process
• Harga lebih tinggi dibanding Type K

Perbandingan Type K, S dan R

Memilih Thermocouple untuk Burner dan Boiler

Pemilihan thermocouple tidak hanya berdasarkan temperatur maksimum. Faktor lain seperti atmosfer proses, posisi pemasangan, response time, panjang probe, diameter probe, sheath material, dan jenis controller juga harus dipertimbangkan.

Untuk aplikasi burner, Type K biasanya sudah memadai untuk monitoring temperatur pada banyak sistem. Untuk furnace atau proses dengan temperatur sangat tinggi, Type S atau Type R dapat dipertimbangkan.

Kesimpulan

Type K cocok untuk penggunaan industri umum dan merupakan pilihan ekonomis untuk banyak aplikasi temperatur.

Type S dan Type R lebih sesuai untuk aplikasi temperatur tinggi yang membutuhkan kestabilan pengukuran dan material platinum.

Untuk memilih thermocouple yang tepat, sebaiknya tentukan terlebih dahulu:

Temperature range + jenis proses + atmosfer + mounting + panjang probe + controller/instrument.

High temp industrial furnace thermocouple temperature sensor

Type S Thermocouples
High-temperature applications that reach up to around 2900°F use the Type S thermocouple. Lower temperature processes also use Type S thermocouples because of their accuracy and stability. High-temperature procedures, especially in the biotech or pharmaceutical industries, most frequently use the Type S thermocouple. Like all platinum-type thermocouples, always use a ceramic tube to protect the Type S thermocouple.

High temp industrial furnace thermocouple temperature sensor

Type R Thermocouples
Like the Type S, the Type R thermocouple is used in high-temperature applications reaching up to 2900°F. However, never use the Type R in reducing atmospheres. And as an all platinum-type, a ceramic tube should always protect Type R thermocouples.

High temp industrial furnace thermocouple temperature sensor

Type B Thermocouples
Temperature applications of up to around 3200°F use the Type B thermocouple. Use this platinum-type of thermocouple in oxidizing or inert atmospheres with applications ranging from 1000°F to 3100°F. Never use Type B thermocouples in reducing atmospheres. Always use a ceramic tube to protect this type of thermocouple.

Case Study: Industrial Thermocouple Applications

 1 – Type K Thermocouple for Industrial Burner

A Type K thermocouple is commonly used for temperature monitoring in industrial burners, boilers, ovens, and heating systems.

In a typical burner application, the thermocouple is installed at the process temperature measurement point and connected to a temperature controller or PLC.

Typical system:

Burner → Heating Chamber → Thermocouple → Temperature Controller → Burner Control

Type K is suitable for many general industrial applications because of its wide temperature range, good oxidation resistance, and relatively economical cost.

 2 – Type S Thermocouple for High-Temperature Furnace

A Type S thermocouple is suitable for applications requiring higher temperature measurement and long-term stability.

For example, in a high-temperature furnace, the thermocouple can be installed inside a ceramic protection tube to protect the sensor from the harsh process environment.

Typical application:

Furnace → Ceramic Protection Tube → Type S Thermocouple → Temperature Controller → PLC

Type S is commonly selected when the process temperature is beyond the practical range of standard Type K thermocouples.

3 – Type R Thermocouple for High-Temperature Industrial Process

A Type R thermocouple can be used for high-temperature industrial processes where stable and reliable temperature measurement is required.

Typical applications include:

• High-temperature furnace
• Kiln
• Heat treatment equipment
• Ceramic processing
• Metal processing
• Laboratory furnace

Type K vs Type S vs Type R

Choosing the Right Thermocouple

The correct thermocouple should be selected based on the actual process conditions rather than temperature alone.

Important factors include:

• Operating temperature
• Maximum temperature
• Process atmosphere
• Probe length
• Probe diameter
• Protection tube material
• Response time
• Installation location
• Controller input
• Required measurement accuracy

For boilers, gas burners, thermal oil heaters, ovens, and dryers, Type K is often a practical choice for general temperature measurement.

For high-temperature furnaces and heat-treatment processes, Type S or Type R may be more appropriate.

Conclusion

Selecting the right industrial thermocouple can improve temperature monitoring, process stability, and equipment control. Type K is a versatile choice for general industrial applications, while Type S and Type R are better suited to demanding high-temperature applications.

Keywords: Type K Thermocouple, Type S Thermocouple, Type R Thermocouple, Industrial Thermocouple, Ceramic Thermocouple, High Temperature Thermocouple, Boiler Thermocouple, Burner Thermocouple.

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