Emissivity Measurement Set Up For Laboratory

The test plate comprises a mica heater sandwiched between two circular plates. Black plate is identical with test plate, but its surface is blackened. As all the physical properties, dimension and temperature are equal heat losses from both plates will be same except radiation loss. Hence the input difference will be due to the difference in emissivity. Both plates are supported on individual brackets in an enclosure with one side glass to ensure steady atmospheric conditions. Temperature Sensors are provided to measure the temperature of each plate and surrounding. Electric Supply is given to heaters through separate variances so that temperatures of both can be kept equal and is me assured with Digital Voltmeter and Digital Ammeter.