The HYGROTHERM 519 is state-of-the-art technology. The operating and control operations are minimized or automated. With its large 300-litre, standard-compliant test chamber made of acid-resistant and heat-resistant plastic, the HYGROTHERM 519 is also ideally suited for continuous testing and quantity tests. The extended HYGROTHERM 519 SA humidity cabinet (with the same design) is equipped with a semi-automatic controller and operates semi-automatically. The HYGROTHERM 519 FA version also has a PLC control system which ensures a fully automatic process for temperature control, acid supply and removal, soil water filling, soil water discharge, refilling of the soil water tank and ventilation.