13 and valve 17 are located in piping 7 between inlet 5 and blending location 9 meter 13 measures the amount which can be either a volume or mass of fluid component supplied from inlet 5 that flows through piping 7 and provides an output of the amount measured to blender controller 21 through communication conduit 27 valve 17 controls the flow of fluid component from inlet 5 through piping 7 to blending location 9 as determined by an output signal from blender controller 21 through communication conduit 29 blender controller 21 receives signals from meters 11 13 and provides output to valves 15 17 based and inputs and or outputs information with external devices not shown such as a computer key pad switch monitor sensor mechanical preset electronic preset programmable logic controller plc terminal automation system tas or other through information conduit 31 with continued reference to fig1 in blender controller 21 of blender apparatus 1 receives information through conduit 31 which can include blend recipe batch size start and finish of blend process and other information based on that information and a above described method which is typically implemented by software stored in blender controller 21 the blender controller 21 monitors meters 11 13 and control valves 15 17 to achieve the desired concentration of the two fluid components supplied from inputs 3 5 in the blended fluid delivered from blender apparatus 1 at blender output 19 blender controller.