API oil is a petroleum based fluid, certified by the American Petroleum Institute. Commonly known API oil is engine oil. Caustic and corrosive liquids are characterized for their ability to damage/corrode other surfaces as the fluid media comes into contact with it. Both are harsh on traditional metering elements, which is why this particular Hedland flow meter was designed to withstand these types of fluids. For operators needing a quick, visual indication of flow, these meters provide the perfect solution, without the need for additional electronics. A wide range of end fittings and expansion options allow for system compatibility and well as remote system integration options via electronic output.