Tube Furnace Model: HT-1200N                 Sample size: dia60x300mm ( dia2.5" x12" )  Main Specifications: Inside Chamber Size dia60x300mm( diameter2.5" x 12" ) Standard Working Temperature 1100.C ( continuous ) Maximum Working Temperature 1200.C ( < 3 hrs) Temperature Control 30 steps programmable and PID automatic control Heating Rate 0~ 10.C/ min ( suggestion: = < 10.C) Temperature Accuracy + 1.C  Heating Element Fe-Cr-Al-Mo resistance wire Working Voltage AC 220V Single Phase 60/ 50 Hz ( or according to your requirement) Max. Power 2 KW Net Weight 70 Kg   Note: The furnace tube is quartz tube         Dia60mm means outer diameter, inner diameter is about 50mm         300mm means the length of hot zone Total length is 1000mm  Standard Sizes: Model Chamber size Max. Temperature HT-1200NT Dia40x300mm ( 1.5" x12" ) 1200.C HT-1200NT Dia40x450mm ( 1.5" x18" ) 1200.C HT-1200NT Dia60x300mm ( 2.5" x12" ) 1200.C HT-1200NT Dia60x450mm ( 2.5" x18" ) 1200.C HT-1200NT Dia80x300mm ( 3.0" x12" ) 1200.C HT-1200NT Dia80x450mm ( 3.0" x18" ) 1200.C HT-1200NT Dia100x450mm ( 4.0" x18" ) 1200.C