The outer casting is made of double walled thick P.C.R.C. sheet re-attached with thick perforated sheet on the bottom portion, powder coating with attractive stove enamel. The distinct feature of perforated sheet is to prevent the temperature control unit from very high heat. Furnace is lagged with Light weight with ceramic fibre wool insulation (instead of brick insulation). Heating elements are made of KANTHAL - A1 wire of coil form embedded on the muffle with high grade refractory cement and backed by high temperature cer-wool insulation which avoids loss of energy. This arrangement will ensure the most uniform kind of distribution of heat. The weight & size of furnace is of one quarter and 30% respectively as compared to brick furnace.
A safety thermal fuse is provided to fuse of when the temperature exceeds the set temperature.
A viewing cap is also provided on the door. Temperature control unit consists of a microprocessor based digital PID temperature indicator cum controller, fitted in front of furnace with two indicator lamps. The apparatus is complete with One thermocouple, silver thermal fuse, main lead with power plug to work on 220/230 V or 400/440 V AC.
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