#2799: SwarfSentry

When you change the oil in your vehicle, it’s common to use a magnetic sump plug that collects ferrous particles.

Today’s invention extends that idea by embedding a sensitive magnetic flux sensor within the plug.

This Hall Effect device (of the same type as is used eg to sense wheel speed) detects changes in the amount of iron-based debris sitting on top of the plug and can thus be used to provide, say, a weekly insight into the wear that’s taken place within one’s engine (after track days, for example).

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