| 摘要 |
An apparatus and a method for monitoring a ratio of at least two components being mixed use sensors detecting ferrous taggant particles in th e component(s) and the mixture. The sensors include an annular drive coil positioned between inner and outer annular sense coils all surrounding a passage for material being sensed. The ratio is determined by comparing a signal generated by one sensor through which a taggant particle containing component is flowing with a signal generated by another sensor through which the mixture is flowing delayed by the time required for the component to flo w from the one sensor to the another sensor. The signals can also be used to contro l the flow of the components and to check the mixture after use.
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