There is no possible reason someone would need this, but man, does it look cool. I wonder how well it blends. What would be even better is a way to retrofit an existing blender with a tachometer (or, as the parent article suggests, that all blenders include this). Something that would look swank and would still work well as a blender. Still, I'm sure some enterprising molecular biologist will know something that has to be blended at exactly 17,312 RPM. Okay, I suppose that is a possible reason someone would need it. Likely? No. Possible? Sure.
L'Equip R.P.M. Blender with Tachometer: "While it doesn't justify the purchase of a new model just to get it, this 'R.P.M. Blender' from L'Equip has a tachometer on the side. It does seem sort of obvious now that someone's made one, doesn't it? I'd like to see this added to all blenders as standard issue.
The R.P.M. is powered by a 900 watt motor that can spin up to 20,000 revolutions per minute. It's available for $134 plus shipping.
(Via Boing Boing Gadgets.)