Stefan Boltzman Apparatus

Stefan Boltzman Apparatus for Educational Laboratory.

Product Code:


Stefan Boltzman Apparatus

  • The apparatus is designed to determine the Stefan Boltzman constant.
  • The apparatus consists of a hemisphere fixed to a Bakelite plate, the outer surface of which forms the jacket to heat it.
  • Hot water to heat the hemisphere is obtained form a hot water tank, which is fixed above the hemisphere. The copper test disc is introduced at the center of hemisphere.
  • The temperatures of hemisphere and test disc are measured with the help of temperature sensors.


  • Determination of Stefan Boltzmann constant and study the effect of hemisphere temperature on it.

Utilities Required:

  • Electricity Supply : 1 Phase, 220 V AC, 2 kW.
  • Table for set-up support.

Technical Specifications:

  • Hemisphere Dia: 200 mm (approx.) made of Copper
  • Jacket Dia: 250 mm (approx.) made of Stainless Steel
  • Test Disc Size: 20 mm Dia. x 1.5-mm thickness made of Copper
  • Water Tank: Stainless steel 12 Ltrs. cap
  • Heater: Nichrome wire immersion heater
  • Digital Temp. Controller: 0 to 199.90C, (for water tank)
  • Digital Temp. Indicator: 0 to 199.90C, with multi channel switch
  • Temperature sensors: RTD PT-100 type
  • Instruction Manual: An english instruction manual will be provided along with the Apparatus
  • The whole set-up is well designed and arranged on a powder-coated structure