The OVAL NPI45B20 1158CC is a high-precision positive displacement flowmeter, engineered for accurate and reliable measurement of liquid flow. It operates on the proven oval gear principle, where two intermeshing gears rotate to pass a fixed volume of fluid with each revolution. This mechanical design ensures consistent accuracy across a wide range of viscosities and flow rates. Equipped with an integrated mechanical register (indicator), this model allows for direct, on-site reading of the total flow volume without the need for external power. Its robust construction makes it ideal for demanding industrial applications such as fuel oil measurement, chemical batching, and general process control.