Emissivity of a Test Surface Apparatus:

1. Test plate and reference plate size 140mm dia

2. Enclosure size is 55 cm x 30 cm x 30 cm with one side of Perspex sheet

3. Heater: 200 V 400 watts, Nichrome wire type, sandwiched between mica sheets.

4. Control panel comprising of

a) Digital / analogue voltmeter.

b) Digital / analogue ammeter

                                                c) DPDT selector switch for voltmeter and ammeter.