Ko te tuku pēhanga ahumahi paerewa WP401A, e whakakotahi ana i ngā huānga pūoko kawemai matatau me te hangarau whakauru āhua-totoka me te hangarau diaphragm wehewehe, kua hangaia kia mahi pai i roto i ngā āhuatanga rerekē, kia pai ai te whakamahi me te pono mō ngā tono ahumahi maha.
He maha ngā tohu putanga o te tuku ine me te pēhanga tino, tae atu ki te 4-20mA (waea-2) me te RS-485, ā, he kaha hoki te ārai-whakararuraru hei whakarite i te ine tika me te ōrite. Ka whakarato tōna whare konumohe me te pouaka hononga i te pakari me te tiaki, ā, ka tāpirihia he whakaaturanga ā-rohe whiriwhiri hei whakamama me te urunga atu.