Q. Which photodiode exactly is compatible with this LED?
A. Thanks for your enquiry Ben. This is an ordinary LED with a peak wavelength of 660nm. There is no photodiode in our range that exactly matches this closest would be either light sensor 58-0120 which has peak sensitivity at 580nm or 58-0142 which has a peak sensitivity of 850nm but has a range from 350-1100nm, this is only available to back order.