Patent ID: 7360564

Claim:
A method of measuring the densities of fluids by means of an apparatus for dispensing a plurality of fluids, the apparatus comprising a plurality of volumetric metering pumps, each pump connected to a container by a connector for releasably connecting said container to its respective pump, and the apparatus further comprising a weighing device for measuring a weight of fluid dispensed by the pumps, the method comprising: dispensing a first pre-selected volume of a first fluid from a first volumetric metering pump; measuring the weight of the dispensed volume of the first fluid; dividing the measured weight of the first fluid by the pre-selected volume thereby yielding a value for density of the first fluid; dispensing a second pre-selected volume of a second fluid from a second volumetric metering pump; measuring the weight of the dispensed volume of the second fluid; and dividing the measured weight of the second fluid by the second pre-selected volume thereby yielding a value for density of the second fluid.