Model 426 is for Aluminum, Silver 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.
The furnace core is a specially-designed stress-free isothermal heat pipe, which provides a very low thermal gradient along the core working length.
The heatpipe 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.
Connections are provided for a water supply of 0.5 to 1 liter per minute. Water supply and waste connections are provided. Use without cooling is not recommended above 700°C.
The Oberon can be used with Blackbody Fixed Point Cells.