Ka inehia he mita rere ultrasonic momo rerekētanga wā-haere mā te whakamahi i ngā takirua whakawhiti (ngā pūoko A me B i te pikitia i raro nei), e tuku me te whiwhi i ngā ngaru ultrasonic i te wā kotahi (i te wā kotahi rānei). Ka tere ake te haere o te tohu ki runga i te wai i te rere ki runga i te wai, ā, ko te rerekētanga wā he kore ina noho pūmau te wai. Nō reira, i te mea ka inehia te wā o te horapa o te ia me te ia whakamuri, ka taea te whiwhi i te uara rerekētanga △t. Kātahi, e ai ki te whanaungatanga i waenga i te △ T me te tere V, ka taea te ine ā-kore i te tere toharite o te reo, ā, ka taea te tatau i te rere rōrahi Q e ai ki te horahanga whakawhiti-wāhanga.
V = K * △ t
Q=S×V, ko K he pūmau, ā, ko S te horahanga whakawhiti-wāhanga i roto i te paipa.
He pai te mita rere ultrasonic wā-haere mō te ine i te wai tino ma i roto i te paipa kua kati katoa, ā, ko te nui o ngā matūriki iri, ngā mirumiru rānei i roto i te wai i inehia he iti iho i te 5.0%. Ka taea te whakamahi whānui i tēnei momo mita rere i roto i ngā wai kei raro iho.
1) Wai tap, wai rere, wai whakamatao, wai whakamahana, me ētahi atu;
2) Wai mata, wai moana, wai para whānui i pupū ake, wai para tuarua rānei;
3) Inu, waipiro, pia, rongoā wai, me ētahi atu;
4) Te whakarewa matū, te miraka, te miraka kawa, me ētahi atu;
5) te penehīni, te hinu karāhe, te tīhiera, me ētahi atu hua hinu;
6) Te tipu hiko (karihi, wera, me te waipēhi), te wera, te whakamahana, te whakamahana;
7) Te kohikohinga rere, te kimi turuturu; Te whakahaere rere, te ine i te wera, te pūnaha whatunga aroturuki;
8) Te whakarewa, te keri, te hinu, te ahumahi matū;
9) Te aroturuki i te penapena pūngao me te whakahaere penapena wai;
10) Kai me te rongoā;
11) Te ine i te wera me te taurite wera;
12) Te whakatikatika i te mita rere i te papaanga, te whakatikatika, te aromatawai raraunga, me ētahi atu.
Wā tuku: 20-Ākuhata-2021