7CardBud Well-Known Member Oct 9, 2020 #1 I know the photodiode will be cheap, probaly the $5-10 range. I'm guessing most of the price of these sensors is in the band pass filter.
I know the photodiode will be cheap, probaly the $5-10 range. I'm guessing most of the price of these sensors is in the band pass filter.
Boatguy Well-Known Member Oct 9, 2020 #2 You can buy a name brand sensor and connect it to a multimeter. You will have to do the math but will have accurate measurements
You can buy a name brand sensor and connect it to a multimeter. You will have to do the math but will have accurate measurements
7CardBud Well-Known Member Oct 9, 2020 #3 Boatguy said: You can buy a name brand sensor and connect it to a multimeter. You will have to do the math but will have accurate measurements Click to expand... Got any links for a decent one to use in my greenhouse? The only sensor sales I've seen are for aquarium use and seem way overpriced.
Boatguy said: You can buy a name brand sensor and connect it to a multimeter. You will have to do the math but will have accurate measurements Click to expand... Got any links for a decent one to use in my greenhouse? The only sensor sales I've seen are for aquarium use and seem way overpriced.
