Ko te WP401B, he momo tuku pēhanga iti, he hanganga pou, he otinga whakahaere pēhanga whai hua, he watea hoki. He māmā te whakamahi i tōna hoahoa porotaka, ā, he ngāwari hoki mō te tāutanga wāhi uaua i roto i ngā momo tono aunoatanga tukanga katoa.
He momo tuku pēhanga iti te WP401BS. He mea hanga kia angiangi, kia māmā hoki te rahi o te hua, he utu pai, ā, he mea hanga ki te maitai kore waikura. Ka whakamahia te hononga waea rererangi M12 mō te hononga paipa, ā, ka tere, ka māmā hoki te tāutanga, he pai mō ngā tono i runga i te hanganga tukanga uaua me te wāhi whaiti e toe ana mō te whakairi. Ka taea te whakaputa i te tohu iahiko 4~20mA, te whakarite rānei ki ētahi atu momo tohu.