It seems the UV LED has been obsoleted so I’m wondering if anyone has found a good replacement.
The part # for the original UV LED is listed as 1807-1023-2-ND in the BOM, but returns no info on Digi-Key. After some digging around my best guess is Mfg# RVXR-280-SM-073105. If that’s the case, Digi-Key#: 732-15335327CA452TR-ND (15335327CA452, Würth Elektronik) seems like a pretty good replacement.
That is correct. The LED has I believe had a few changeovers at Labmaker depending on availability. Often these parts seem to go obsolete. The one you have identified (Wurth 15335327CA452) looks like a perfect replacement, in terms of wavelength and current/voltage profile. One difference between emitters is some have a focusing lens and others not. However, given its proximity to the test-tube this may not be supremely important as a large fraction of light will reach the cells regardless.
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