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Jul 18, 2014 at 13:01 comment added polkovnikov.ph Water is "black" for IR. It's even used for "heat curtains". This kind of sensor wouldn't work.
May 18, 2013 at 15:32 comment added jobukkit Hopeless complete idiots could still ruin the machine by pouring in water and then throwing beans in the water they just poured in. But those people are too rare to care about.
Feb 8, 2013 at 20:17 history edited Todd S CC BY-SA 3.0
added 24 characters in body
Feb 5, 2013 at 22:19 review First posts
Feb 5, 2013 at 22:42
Feb 5, 2013 at 22:03 history answered Todd S CC BY-SA 3.0