This apparatus is used to calculate the thermal conductivity of metal rod (Copper). Experimental setup consisting of: Test rod of copper of 12mm dia. and 200mm long. Ring type Heater Cooling chamber of dia125mm and 50mm long with arrangement for water circulation Shell filled with asbestos insulating powder Set of thermocouples - 6 Nos. Control panel consisting of: 6 Channels Digital Temp. Indicator range: 0-300oC Dimmerstat : 0-2A / 230V Mains ON/OFF switch Digital Voltmeter 0-250V Digital Ammeter 0-2 A.