Sonya Ceramics offers Magnesium Silicate made Thermostat. Sonya Ceramics is an ISO 9001 accredited company. Sonya Ceramics also manufactures Ceramic items made from Porcelain, Steatite, Cordierite Refractory, Cordierite Tube and Thermo Couple Heads, Insulators, Alumina Refractory and High Alumina of different grades. The Magnesium Silicate made Thermostat is used as an insulator.