Class Information
Number: 250/356.1
Name: Radiant energy > Invisible radiant energy responsive electric signalling > Flow metering
Description: Subject matter which includes a passageway containing moving material or a substance controlled by the moving material, a radiation source which may be the material itself, a detector responsive to the radiation from the source after passage of the radiation through the material or substance or the radiation from the material, wherein the detection forms the basis for a rate of flow determination and methods corresponding to the apparatus.
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