The Planted Tank Forum - View Single Post - DIY PAR meter, Yeah you heard me
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Old 11-08-2010, 07:26 PM   #14
No more Bow ties
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Oh, I'm just looking into the Hamamatsu diode... Haven't bought it yet until I played around with the cheaper diode.

photo sensitivity is a electrical engineering term referring to photodiodes:

And spectral sensitive is another term for photo sensitivity ( another unit of measurement like inches & centimeters ).. I assume they measure the same thing.
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