Optics Technology manufactures Muffle Furnace with P.C.R.C. Optics Technology is an ISO 9001:2000 certified company. Muffle Furnace with P.C.R.C. Sheet made Outer Casing has light weight with ceramic fiber wool insulation. The P.C.R.C. Sheet is double walled and thick, reattached with thick perforated sheet on the bottom portion, painted wit attractive stove enamel. Heating elements are made of KANTHAL "A-1" wire and backed by high temperature insulation, which avoids loss of energy. Temperature control unit of Muffle Furnace with P.C.R.C. Sheet made Outer Casing consists of energy regulator, fitted in front of furnace with two pilot lamps. The apparatus is complete with one pyrometer, thermocouple, silver thermal fuse, main lead with power plug. It works on 220/230 volts or 400/440 volts A.C. The energy regulator dial of the product is arbitrarily marked 0-100 position. This marking does not indicate temperature but indicates control level that is at Position "100" maximum electricity is allowed to flow to the furnace. At position "0" minimum electricity is flow to furnace. Maximum temperature of the product is 950 degree centigrade and working temperature is degree centigrade.