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Benefits VSH at a glance

  • Wide range combination sensor Pirani / Bayard Alpert
  • Bayard Alpert with blowing resistant, yttrium coated double filament
  • Longterm tests confirm excellent life time: up to 100,000 shock venting cycles

Vacuum furnaces

Processes such as brazing, sintering or annealing metals require an oxygen-free atmosphere. They are carried out in a vacuum, sometimes using inert gas.

Challenge

The vacuum level must remain constant throughout the entire process in order to to prevent e. g. an oxidation of the products. A constant monitoring is therefore mandatory. For our customer, the pressure in a tubular high-vacuum furnace had to be measured with high accuracy both near the inert gas inlet and at the vacuum port.

Solution

Two VSH transducers offered the large measuring range required for this application and detected the pressure at the furnaces gas inlet and vacuum port with excellent precision. Linked to the system PLC by their serial RS485 interfaces, both pressure levels can be directly visualized in a diagram. This allows for an easy monitoring of the pressure gradient inside the furnace tube.

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