Description

Silicon Nitride Thermocouple Protection Tube for Molten Aluminum

Accurate temperature measurement is essential in aluminum melting and holding operations. However, thermocouples operate in harsh environments where high temperatures and direct contact with molten metal can affect sensor protection and service life.

A Silicon Nitride Thermocouple Protection Tube provides a protective barrier between the thermocouple and molten metal. As a result, it supports reliable temperature measurement in demanding aluminum and non-ferrous metal applications.

Protection for Molten Metal Temperature Measurement

Made from pressureless sintered silicon nitride, the protection tube is designed for use with molten metals, including aluminum, zinc, and brass.

Silicon nitride offers several properties that make it suitable for high-temperature applications:

• High flexural strength
• Excellent thermal shock resistance
• Very low porosity
• High-temperature resistance
• Stable performance in molten metal environments

Designed for High Temperatures

The protection tube can operate at temperatures up to 1,200°C in atmospheric conditions, with a nominal operating temperature of 1,000°C.

Key material properties include:

• Bulk density: 3.1 g/cm³
• Porosity: < 0.1%
• Flexural strength: 690 MPa
• Thermal shock resistance: 700°C
• Thermal expansion coefficient: 3.5 × 10⁻⁶ (RT–1,000°C)

Flexible Sizes and Configurations

Different furnace and measurement systems require different tube dimensions. Standard protection tubes are available in various diameters and lengths.

Depending on the application, options include special diameters and lengths, grooves or carvings, dedicated holders, thermocouple assemblies, and flange-attached configurations.

Reliable Protection for Aluminum Temperature Measurement

For aluminum foundries, reliable temperature measurement helps maintain better control during melting and holding operations.

A suitable silicon nitride protection tube helps shield the thermocouple from the demanding molten metal environment while supporting stable temperature measurement.

PT Wilisindomas Indahmakmur provides thermocouple protection solutions for aluminum melting, holding, and other non-ferrous metal applications.

Contact us to find the right Silicon Nitride Thermocouple Protection Tube for your furnace and temperature measurement requirements.