Ko te viscometer he pūrere e ine ana i te matotoru, i te matotoru rānei o tētahi wai. Ka hoatu e ia ki a mātou he whakaaro mō te whanonga rere o ngā wai. Hei tauira, he matotoru te honi, ā, he puhoi te rere, i te mea he iti te wai, ā, he tere te rere. Ko ngā rāngai rerekē pēnei i te kai, te whakapaipai, me ngā matū e hiahiatia ana hoki te mōhiotanga o te whanonga o te wai. Ka whakaputahia e ZONWON Ngā tapiri wātata o te whakamātautau pai hei āwhina i ngā pakihi ki te whakamātautau i te rere o ō rātou hua. Ina mōhio koe ki ngā āhua o te rere o tēnei wai, ka taea e koe te hanga i ngā hua pai me te whakamānui i ō kiritaki.