Idatha ye-WP421Aumshini wokushisa ophakathi nendawo nophezulu uhlanganiswa nezinto ezizwelayo ezingeni lokushisa eliphezulu ezingenisiwe, futhi i-sensor probe ingasebenza ngokuzinza isikhathi eside ekushiseni okuphezulu kwama-350.℃. Inqubo ye-laser ye-welding ebandayo isetshenziswa phakathi komgogodla kanye negobolondo lensimbi engagqwali ukuze inyibilike ngokuphelele ibe ngumzimba owodwa, iqinisekisa ukuphepha komthumeli ngaphansi kwezimo zokushisa eziphezulu. I-pressure core yenzwa kanye nesekethe ye-amplifier kufakwe ama-gaskets e-PTFE, bese kwengezwa usinki wokushisa. Izimbobo zokuhola zangaphakathi zigcwaliswa nge-high-efficiency thermal insulation material aluminium silicate, evimbela ngokuphumelelayo ukuhanjiswa kokushisa futhi iqinisekise umsebenzi wengxenye yesifunda yokukhulisa nokuguqulwa ekushiseni okuvumelekile.