The Pyrometer pictured on the left is the exact type used at the Telefunken
Tube Plants in Ulm and Berlin made by H&B. The Pyrometer on the right is an East German version that was used at the
various RFT tube plants. The one shown in this picture came out of the tube plant in Muehlhausen and was made by Pruefgeraetewerk
|Technical Drawing of the H&B Pyrometer.