A Cartridge Heater with Thermocouple is a highly efficient industrial heating element designed for localised heating and precise temperature control. It consists of a cylindrical, tubular structure that contains a resistance wire heating element, typically made of materials like nickel-chromium (NiCr). The key feature of this heater is the built-in thermocouple, which enables real-time temperature monitoring and control, making it ideal for applications that demand precise heat regulation.
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A Cartridge Heater with Thermocouple is a highly efficient industrial heating element designed for localised heating and precise temperature control. It consists of a cylindrical, tubular structure that contains a resistance wire heating element, typically made of materials like nickel-chromium (NiCr). The key feature of this heater is the built-in thermocouple, which enables real-time temperature monitoring and control, making it ideal for applications that demand precise heat regulation.
Specifications of Thermocouple-equipped cartridge heater
1. Size:
Diameter: Sizes range from 3mm to 30mm (1/8 inch to 1 inch), but custom sizes can also be specified.
Length: It usually ranges from 25mm to 500mm (1 inch to 20 inches).
2. Wattage:
Power rating: Usually between 50W and 3000W.
Watt density is the amount of power dissipated per square inch of the heater's surface area. High watt density allows for fast heating.
3. Voltage:
Common ratings include 12V, 24V, 120V, 240V, and 480V. Custom voltages are also available.
4. Thermocouple type:
Type J: Iron-Constantan thermocouple, good for temperatures up to 750°C.
Type K: Chromel-Alumel thermocouple, suitable for temperatures up to 1260°C (2300°F). The most common type in cartridge heaters.
Type T or Type N can also be chosen for specific uses.
5. Temperature range:
The operating temperature is usually between 100°C and 800°C.
Some high-temperature models can exceed 1000°C.
6. Sheath Material:
Stainless steel is standard. It is resistant to corrosion and can withstand high temperatures.
Incoloy is used for high temperatures (up to 980°C or 1800°F).
Nickel is suitable for specific chemical environments.
7. Lead wire type:
Fiberglass insulation. Used up to 450°C (842°F).
Teflon or silicone insulation. For high temperatures and flexibility.
Ceramic insulated leads. Used for extreme heat.
8. Cold section:
A non-heating area near the leads to prevent wire damage.
The cold section is usually between 5mm and 15mm long.
9. Mounting options:
Cartridge heaters can be mounted in different ways, depending on what they are used for.
10. Resistance tolerance:
±10% of the specified resistance, ensuring consistent performance.
11. Insulation:
Magnesium oxide (MgO): Used as insulation inside the heater, providing electrical insulation and good thermal conductivity.
1. Integrated thermocouple for temperature monitoring
The built-in thermocouple allows for accurate temperature feedback, ideal for applications that require precise temperature control.
2. Compact and Cylindrical Design
The heater's tubular, cylindrical shape makes it easy to insert into drilled holes, allowing for efficient heat transfer in confined spaces.
3. Durable Sheath Materials
The heaters are made from high-quality materials like stainless steel or Incoloy, making them suitable for high-temperature and harsh environments.
4. Excellent Heat Transfer
Cartridge heaters offer optimal heat transfer, improving efficiency.
5. Cold Section for Lead Protection
A built-in cold section prevents heat damage, enhancing the heater's longevity.
6. Resistance to Shock and Vibration
These heaters are durable in applications with high levels of vibration and movement.
Application
1. Aerospace and Automotive Industries
Used to heat components in testing equipment.
Precise temperature control is important for testing materials and components in extreme conditions.
2. Heat Transfer Fluids and Oil Heating
Used in systems that heat oil, water, or other fluids in circulation systems.
The thermocouple prevents overheating, ensuring safe and efficient industrial heating.
3. Hot Runner Systems
Purpose: Maintains consistent flow temperatures for plastic materials in plastic injection molding.
Benefit: Controlling the temperature prevents blockages or cold spots, which improves the quality of the product.
4. Semiconductor Manufacturing
Used in semiconductor production equipment for heating and testing.
Precise temperature control is essential for maintaining quality in the semiconductor industry.
5. Heating for Dies and Seals
Used in die-heating systems for printing presses, stamping machines, and other tools.
The thermocouple ensures heat is distributed evenly, which is important for creating smooth and uniform seals or imprints.
6. Die-Casting and Metal Molding
Used to heat dies and molds in die-casting machines, providing controlled heating for the formation of metal components.
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