SmartMeasurement's ALCM coriolis mass flowmeters use two tubes in a parallel arrangement which are rotated at their resonant frequency by coils. Any mass flow passsing through the tubes will generate coriolis forces which appear whenever a mass moves radially in a rotating system. The forces have opposite effects on the inlet and outlet side, deforming each pipe by a minor amount. The excursion of the pipes is detected by the inlet and outlet-side sensors. The phase shift between the rotational frequencies of both pipes is directly proportional to the mass flow rate and the resonant frequency of both pipes changes in accordance with the density of the fluid media. This effect allows for measurement of the density. Using only one sensor, both density and temperature measurements may be performed. The extent of deformation of the pipes is temperature-dependent. Therefore, the temperature is measured for compensation purposes. Using only one primary sensor, values including mass flow, density, and temperature may be measured. The ALCM's microprocessor-based circuitry allows for conversions such as volumetric flow and % concentration to be calculated.

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