Mõõtepais on lihtsalt struktuur, mille kohal vesi voolab nii, et saab arvutada mahulise vookiiruse ja see annab teadmise, kui palju vett voolab mingis ajavahemikus üle paisu.
A flow measuring weir is simply a structure over which water flows in such a way that volumetric flow rate can be calculated, and it lets you know how much water is flowing.