TC202 is Dual protection tube with a Silicon Carbide (SiC) protective tube is a high-temperature sensor designed for continuous monitoring of molten aluminum in holding furnaces, crucibles, and ladles. The SiC sheath provides excellent thermal shock resistance, corrosion protection, and mechanical strength, making it ideal for harsh foundry environments. Its comes in straight and L-shape thermocouples.
Key Features:-
- Available in different thermocouple types R,S,B,K,J & C
- Exposed and recessed Jucntion avaialbe with single and Duplex/Dual construction
- Available in single junction, Duplex avaiable with Mineral Insulated MGO-PAC style
- Available in 8 AWG,14 AWG, 20 AWG for base metal, 24,26, & 30 AWG for Noble metal
- Outer Silicon Carbide (SiC) protective tube offers superior resistance to thermal shock, oxidation, and corrosion from molten aluminum.
- Inner protection Tube Mullite and Alumina, Custom option available
- Typically operates in the temperature range of 800°C to 1800°C (1470°F to 3272°F) depending on the thermocouple type
- Available in standard and special tolerances as per IEC 60584 and ANSI MC96.1.
- Supports Flange and Plate with Gasket
Application Note
In aluminum processing—including casting, refining, and holding furnaces—precise temperature monitoring is essential to prevent defects and ensure uniform melting. However, molten aluminum is highly corrosive, and standard thermocouples quickly fail due to chemical attack, leading to inaccurate readings and costly downtime.
The TC202 Silicon Protection Tube Thermocouple with Dual Protection Tube overcomes this challenge. Its sacrificial outer silicon tube resists corrosion from molten aluminum, while an inner tube continues to protect the thermocouple element even if the outer tube is compromised. For high-temperature alloying, noble metal thermocouples provide exceptional accuracy, while base metal types offer a cost-effective solution for holding furnaces.
To ensure reliable operation, immerse the silicon tube at least four to six inches into the melt and pre-heat gradually to prevent thermal shock. If the outer tube cracks, the inner tube maintains protection, allowing planned replacement without emergency shutdowns.
