I-WP421A ephakathi kunye neqondo lokushisa eliphakathi kunye noxinzelelo loxinzelelo oluphezulu ludityaniswe kunye nezixhobo ezithintekayo zobushushu obuphezulu, kwaye i-sensor probe inokusebenza ngokuzinzileyo ixesha elide kubushushu obuphezulu be-350 ℃. Inkqubo ye-laser ye-welding ebandayo isetyenziswa phakathi kwengundoqo kunye negobolondo yensimbi engenasici ukuze inyibilike ngokupheleleyo ibe ngumzimba omnye, iqinisekisa ukhuseleko lomthumeli phantsi kweemeko eziphezulu zokushisa. Ingundoqo yoxinzelelo lwenzwa kunye nesekethe ye-amplifier ifakwe kwi-PTFE gaskets, kunye ne-heat sink yongezwa. Imingxunya ekhokelayo yangaphakathi izaliswe nge-high-effective thermal insulation material aluminium silicate, ekhusela ngokufanelekileyo ukuqhutyelwa kokushisa kunye nokuqinisekisa ukukhulisa kunye nokuguqulwa komsebenzi wesiphaluka kwiqondo lokushisa elivumelekileyo.