Hoʻohana ka hoʻololi kaomi WP401B i ka ʻāpana sensor kiʻekiʻe i lawe ʻia mai, i hui pū ʻia me ka ʻenehana paʻa i hoʻohui ʻia a hoʻokaʻawale i ka ʻenehana diaphragm. Hoʻolālā ʻia ka mea hoʻouna kaomi e hana maikaʻi ma lalo o nā kūlana like ʻole. Hana ʻia ke kūpaʻa pānaʻi wela ma ke kumu seramika, ʻo ia ka ʻenehana maikaʻi loa o nā transmitters kaomi. Loaʻa iā ia nā hōʻailona puka maʻamau 4-20mA a me ka hana hoʻololi (PNP, NPN). He anti-jamming ikaika kēia mīkini transducer a kūpono no ka noi hoʻouna lōʻihi.