The BFS is designed for applications requiring a constant high temperature source for calibration. The BFS has a hinged lid and a cylindrical bath 218mm in diameter and 254mm deep. Substantial fire brick insulation is incorporated within the outer container and the lid.

Standard equipment includes a separate air supply control unit which incorporates two flowmeters for monitoring the air supply and a charge of fluidising medium (aluminium oxide) and air diffuser (zirconium oxide).

Diese beiden Granulate werden in 2 Schichten in den inneren Zylinder des Hochtemperaturbad BFS gefüllt. Die untere Schicht Zirkoniumoxid mit höherer Dichte verflüssigt nicht und wirkt hitzeisolierend. Im Aluminiumoxid bilden sich 2 Wärmezonen, die durch die einströmende Luft mittels der Flowregler gesteuert werden. Die benötigte Druckluft muss frei von Öl, Wasser und Staub sein.

The inner container of the BFS is filled with two layers of fine granular particles. The lower layer (zirconium oxide) is denser than the upper layer (aluminium oxide) and does not fluidise but instead acts as a heat insulator. The inner container of the BFS is divided into inner and outer fluidised sections. Each area has a separate air supply which must be oil, water and dust free.

The TC-5 temperature controller fits into the evisceration of the inner container and is at the rear of the BFS appropriate. For temperature control, and - display in the TC-5 is a 815S Eurotherm controller.