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WL 362 Thermal Radiation Unit
Education / GUNT Hamburg / Thermal Engineering and HVAC / Fundamentals of Thermodynamics /

The experimental unit contains a blackbody emitter with a thermopile for the investigation of thermal radiation, a light source with luxmeter for illuminance measurements, and absorption plates with thermocouples for the investigation of Kirchhoff's laws. The intensity of thermal and visible radiation can be adjusted. Colour filters and apertures extend the range of experiments.

  The measured values are displayed digitally on the measuring unit. At the same time, the measured values can also be transmitted directly to a PC via USB. The data acquisition software is included.

Learning Objectives / Experiments
- Lambert's cosine law
- Inverse-square distance law (Lambert)
- Stefan-Boltzmann constant
- Investigations on the wavelength of light
- Kirchhoff's laws
  * absorptivity
  * reflectivity
  * emissivity

[1] Investigating thermal and visible radiation
[2] Blackbody emitter with thermopile to investigate thermal radiation
[3] White light source with luxmeter to investigate visible radiation
[4] Absorption plate and reflection plate fitted with thermocouples to investigate Kirchhoff's laws

[5] Intensity of thermal radiator and light source adjustable

[6] 3 colour filters with holder (red, green, infrared), aperture
[7] Luxmeter to measure the illuminance 
[8] Thermocouples to measure the temperature

[9] Thermopile to measure the radiation capacity

[10] LabVIEW software for data acquisition via USB under Windows XP or Windows Vista

Technical Data

Thermal radiator

- power output: 400W

- max. temperature that can be reached: 150°C

- radiation surface area: 0.032m²
Light source

- power output of light bulb: 40W

- angle of rotation, both sides: 0...90°

- illuminated area: 0.0289m²

Measuring ranges
- illuminance: 0...2000 Lux
- temperature: 2x 0...200°C
- radiation capacity: 0...400W/m²

Dimensions and Weight
l x w x h: 1460 x 310 x 384 mm
Weight: approx. 20 kg
Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase
Scope of Delivery

1 frame

1 thermal radiator

1 light source

1 luxmeter

1 thermopile

1 absorption plate

1 reflection plate

3 colour filters with holder

1 aperture

1 LabVIEW software CD + USB cable
1 set of connecting cables

1 manual

Order Details
060.36200  WL 362  Thermal Radiation Unit