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The MinIon is an array of nanopores – 512 to be precise – and circuitry housed in a USB stick. Why a USB stick? “The form factor is determined by the requirements” – as there are no fluidics you don’t need a big machine. There are no fluidics. “Your fluidics is a Gilson”, said Brown. The prototype version has an ugly battery pack attached to it but it will eventually use USB power. The USB stick is disposable. “Why do you need an instrument?” he says.