How to measure UV light

Discussion in 'The Projects Forum' started by embpic, Oct 11, 2013.

  1. embpic

    Thread Starter Member

    May 29, 2013
    187
    3
    Hello master's
    what is main concept to measure uv light using controller?
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,797
    1,103
    What sort of 'controller'? Do you mean a MCU?
     
  3. Shagas

    Active Member

    May 13, 2013
    802
    74
    Either use a specific Uv photodiode/phototransistor (even if they exist they won't be cheap imo )
    Or use a broad-range photodiode (easier to find) that goes down to uv range and use a physical uv colour filter as the sensor .
    The photodiode output will to go a microcontroller ADC.
    Also .. UV is anything from about 200nm to 405 nm so you need to specify what you need to measure.
     
  4. DickCappels

    Moderator

    Aug 21, 2008
    2,651
    632
    If that Hamamatsu Photonics UV sensor turns out to be too expensive, you can try using a photo transistor or photo diode designed to handle longer wavelengths and use a florescent material to down-convert the frequency into that detector's range.
     
  5. Shagas

    Active Member

    May 13, 2013
    802
    74
    Interesting , can that really be done?
     
  6. lasercowboy

    New Member

    Oct 12, 2013
    6
    1
    Great idea Dick! if cost is an issue, quinine (from tonic water) will do the trick nicely.
     
  7. DickCappels

    Moderator

    Aug 21, 2008
    2,651
    632
    Probably just a can of day-glo paint would work. And I am sure it would work best with the right combination of LED wavelength, florescent dye, and detector.
     
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