Mass Flow meters have moving parts and complex mechanical designs. It consists of a mass flow sensor or transducer. This is an instrument that measures the mass of fluid that flows through a pipe, duct, or open channel in a unit time. The mass flow of homogenous gases is most frequently measured by thermal flow meters. The main advantage is that when the specific heat of the process fluid changes due to composition or temperature changes, this will register as a change in mass flow. The mass flow of liquids and gases has been detected by angular momentum devices and indirectly through the measurement of volumetric flow and density. It has good accuracy and very high range ability. The modern mass flow meters are based on coriolis effect. This can be measured by batch weighing or by combining an accurate level sensor with a densitometer. This meter can handle high temperatures over 400-degree farenheit.