Inside the vacuum chamber of the High Pressure Reactor is a system of cups which is a closed space in which a sample have contact with gases. Opening and closing the cups is done manually by turning a reaction volume screw. The sample mounting table can be made of stainless steel, titanium, with gold coated surfaces or other materials/alloys, depending upon application. The temperature of sample holders is regulated by HEAT3-PS Power Supply.

Experiments with reactive gases at static or flow mode (temperature of gases up to 300°C) can be performed at pressure from 1 bar up to 20 bar (depends on the type of gas dosing system).

Special design allows for closing the whole PTS sample holder inside reactor cups, therefore there is only one sealing surface. This solution requires larger volume of gas.