Rolf,
You deserve some pictures and I will get you some. This rig is not hard to make if you know someone that can do the welding. I made penetrations out of 1/4 inch pipe nipples that threaded into drilled and tapped holes in the ends (blind flanges) of the steel pipe. Basically, you need one for power to the strip heaters, one for thermocouples, one for pressure inlet, one for a pressure gage,and one for a vacuum/vent line.