The apparatus is a bench top unit is used for studying the laws of heat transfer by radiation using two alternative energy sources namely a radiant heat source and a light source.

The radiation sources as well as accessories are mounted on a horizontal aluminum profile base frame with track scale.

The radiant heat source employs a heater in a housing. Temperature of the heat source can be controlled. Heat radiation is measured by a radiometer. Metal plates with different surface finishes are fitted with thermocouples to demonstrate effect of emissivity on radiation emitted and received. An adjustable vertical slot aperture plates are also provided to study area factor.

The light source is provided by a lamp in a housing with a glass diffuser. Measurement of light is by a light meter. Filters of varying opacity are supplied.

A service module provides power supply, heater control unit and measuring instruments.

Instruction manual is also included.

  • Inverse square law for light.
  • Inverse square law for thermal radiation
  • Lambert’s cosine law for light.
  • Lamberts law of absorption
  • Stefan-Boltzmann’s law of thermal radiation
  • Emissivity different surfaces
  • Emissivity two close radiating surfaces
  • Kirchoff’s law using heat source
  • Area factor using heat source
Base frame:
 - Material Twin aluminium profile
Heat source 400 W heater with housing and a base clamp
Measuring instruments
 - Radiometer Thermopile type with a base clamp
 - Light meter 1 ea.
 - Sensors with digital display Temperature for radiation plates
Radiation plates Two black, one gray and one polished surface, each with a base clamp
Insulated adjustable aperture plates 2 ea.
Light source Light bulb or equal with housing and base clamp
Filters 3 ea. with different opacity and base clamp
Power supply 220 V, 1 Ph, 50 Hz. Other power supply is available on request.
Part No. Part Name
Additional filter
TH 330-050

Computer Interface

This includes computer interface unit with light sensor and radiometer signal conditioning unit.

Other optional equipment please contact manufacturer ([email protected])


Net (unassembled) Shipping Dimensions WxLxH 45 x 155 x 40 cm.
Net Weight Approx. 35 kg.