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The Oberon R uses a Sodium heat Pipe to ensure an exceptionally low temperature gradient along the furnace core. It is ideal for the realization of Aluminium, Silver or Copper ITS-90 Fixed Points.

It may be used as a blackbody source over the range 450°C to 1090°C.

The furnace heater is of the non-inductive bird-cage design insulated by twin bore alumina tubes. The heat pipe is designed so that the inner wall is not subject to thermal expansion stresses from the outer wall before the heat pipe reaches conduction temperature. The working fluid is permanently and safely sealed within the plasma-arc welded enclosure.


Temperature Range450°C to 1100°C
Emissivitygreater than 0.995
Display Resolution0.1°C to 999.9; 1°C from 1000 to 1090
Cavity Size50mm diameter 300mm deep
Time to temperature4 hours
PC InterfaceIncluded
Supply110Vac, 3kW, 50/60Hz CTE (230Vac and 110Vac to 110Vac Isolating Transformers available.)
DimensionsHeight 410mm Width 415mm Depth 280mm
OptionsAluminium Primary BlackBody Fixed Point Cell 998-06-00D Silver Primary BlackBody Fixed Point Cell 998-06-00E Copper Primary BlackBody Fixed Point Cell 998-06-00G Gas Flow System-984-00-00. 230v/110v Transformer-935-19-43. 110v/110v Transformer -935-19-48
How to orderModel 426 Oberon R – Please state voltage required. Please state any special calibration requirement.


Oberon R Model 426

450°C to 1100°C

Model 426 is for Aluminium, Silver or Copper slim fixed point cells as well as for comparison calibration. Heatpipes provide the ideal conditions for the creation and maintenance of slim ITS-90 cells.

  • 50 x 300mm Calibration Volume
  • Compact Heatpipe Furnace
  • Suits Aluminium, Silver or Copper Fixed Points
  • Can be used for comparison and infrared calibration

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