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???
07/07/05 09:51
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#96764 - visible range laser
Responding to: ???'s previous message
why not use a cheap red laser, and a phototransistor

I dont have prices in mind but this should provide good results for very low budjet, you could even use a few of them. as light intensity will be quite high at reiceiver, light emited by glass won't be an issue.
Glass plates@1000C are quite opaque, aren't they?

Best Regards,
Benjamin

List of 14 messages in thread
TopicAuthorDate
Detecting end of hot glass plate            01/01/70 00:00      
   try an infrared photocell            01/01/70 00:00      
      Photocell            01/01/70 00:00      
         visible range laser            01/01/70 00:00      
            nope            01/01/70 00:00      
      infrared ?            01/01/70 00:00      
   Ultrasonic!            01/01/70 00:00      
      Heat            01/01/70 00:00      
         Picture!            01/01/70 00:00      
            Elaborate a little more            01/01/70 00:00      
            Isolating Pipe??            01/01/70 00:00      
               Circulation of Hot air from the open end            01/01/70 00:00      
                  Thanks            01/01/70 00:00      
   Which 8051/8052?            01/01/70 00:00      

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