Gear Flowmeter, Turbine Flowmeter, Digital Flowmeter, Oil Flowmeter used widely in oil, food industry, Size: 3/4"-3" Flowmeter, Gear Flowmeter, Turbine Flowmeter, Oil Flowmeter. 1. OGM Gear Flowmeter. OGM-25/40/50 aluminum oval gear meter has the ability to handle a wide range of fluid viscosities with exceptional levels of repeatability and durability,applying in the petroleum,chemical,food ...