The temperature must be controlled in melting process. Therefore, molten metal temperature is continuously measured by thermocouples in foundry melting and holding furnaces. According to the temperature of surrounding area various sheaths are used in order to be durable and resistant to mechanical impacts, chemical or physical abrasions in the melting process.
- Silicon Carbide (SiC) Thermocouple Protective Tubes
- Silicon Nitride (S3N4) Thermocouple Protective Tubes
It’s a material with lower resistance to thermal shock and mechanical impact properties and corundum attack compared with silicon nitride thermocouples. SiC has a lower price compared with S3N4. The steel pipe inside, provides the convenience of applying.
Silicon nitrite is a high-tech ceramic material with excellent resistance to thermal shock, mechanical impact, corundum formation and chemical additions. The silicon nitride material in the liquid molten aluminum allows high temperature measurement precisely because of its non-adhesion, high heat conductivity and long lifespan properties.