Heathkit ID-4001 IR LED's and P-Trans Replacement IR LED's and Photo-Transistors to be used in our Weather Stations models ID-4001 and ID-5001. These pairs of IR sensors have the same CTR (Current
Transfer Ratio) as the original parts from TI that are no longer available. Please note that these cannot be mixed with the old TI parts. These are brand new I/R LED's and Photo-Transistors for the ID-4001, ID-5001 and a few others that use the same basic wind
speed/direction sensor. One envelope has 5 of the 412-635 (TIL-32 Replacement) I/R LED lamps and the other has 5 of the 417-919 (TIL-78 Replacement)
Photo-Transistors. This is what is required to rebuilt your weather boom.
Returns Accepted for this item if it's within 30 Days