Volumetric water meter

Volumetric meter, on principle of piston rotation, accurate measurement, easy and long term clear reading, etc.
WORKING CONDITION:
Water temperature: ≤40℃
Water pressure: ≤1MPa
MAXIMUM PERMISSIBLE ERROR:
1.In the lower zone from qmin inclusive up to but excluding qt is ?%
2.In the upper zone from qt inclusive up to and including qs is ?%