Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
This would work fine, except in terms of success.

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Smell-o-meter

Know when you smell bad!
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Sometimes you just don't know that you're smelling really bad... Carry this device and you will know when its time to either take a shower or spray that heavy 24hrs deodorant! This device will measure the amount of sweat in certain places, combined with the time it's statying there, and the indicator signales you! Ideal when having a cold!
BartJan, May 29 2001

like this? http://www.halfbake...oom_20smell-o-meter
i guess it would work on the same principles. [mihali, May 29 2001]

[link]






       Yes, but how does it work?
hippo, May 29 2021
  

       Nobody nose
pocmloc, May 29 2021
  

       It could simply measure the amount of ammonia (product of sweat break-down) and sulfur (cause of most other unpleasant smells made by humans) in the air.
Voice, May 29 2021
  

       And they say technology is killing the art of conversation.
wjt, May 29 2021
  
      
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