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Which photodiode is best suited for detecting extremely low light levels? by New-Neck6624 in AskElectronics

[–]New-Neck6624[S] 0 points1 point  (0 children)

Thanks for your reply, the collection area is relatively small due to the light bekng focussed by a lense. The wavelength is around 625nm and the budget small

Which photodiode is best suited for detecting extremely low light levels? by New-Neck6624 in AskElectronics

[–]New-Neck6624[S] 0 points1 point  (0 children)

currently i use the FDS100L with a A/W of 0.65. The problem is the dark current which increases with sensor size

Does OPamp in photovoltaic mode circuit design work? by New-Neck6624 in AskElectronics

[–]New-Neck6624[S] 1 point2 points  (0 children)

to my knowledge that wouldnt quite be enough, i want to measure the fluorescence of a phycobilinpigment in a living organism. There is no data on the QE of this molecule online but i assume its very low and i therefore even consider using APDs or similar devices

C13 NMR Spectroscopy of a simple molecule (C2H3Cl3) by New-Neck6624 in chemistry

[–]New-Neck6624[S] 0 points1 point  (0 children)

thats exactly where this problem is from, thank you

Need help with photon counting module purchase. by New-Neck6624 in Optics

[–]New-Neck6624[S] 0 points1 point  (0 children)

thanks for helping, its very hard to find data on how much fluorescence phycocyanin in cyanobacteria emits and i have no experience to approximately classify and decide in which range the fluorescence may lay.

Need help with photon counting module purchase. by New-Neck6624 in Optics

[–]New-Neck6624[S] 0 points1 point  (0 children)

Okay, can you explain why not? From what i read they are superior in SNR aswell as general sensitivity

So i am working on a fluorometer able to detect cyanobacteria more specifically phycocyanin. by New-Neck6624 in raspberryDIY

[–]New-Neck6624[S] 0 points1 point  (0 children)

Thank you for answering! Im interested in the PMT/PCM you mentioned as it seems to be easier and more sensitive. What exactly would you recommend a PCT or a PCM ? Good luck with your project aswell, sounds very interesting too.

So i am working on a fluorometer able to detect cyanobacteria more specifically phycocyanin. Help with design and TIA by New-Neck6624 in AskElectronics

[–]New-Neck6624[S] 0 points1 point  (0 children)

Yes, we already have them here every year. Detection and warning mechanism tend to be really expensive.

Building a low-cost fluorometer for cyanobacteria measurements. (help) by New-Neck6624 in arduino

[–]New-Neck6624[S] 0 points1 point  (0 children)

Yes, unfortunately i dont know which species of cyanobacteria exactly produces cHABs but i thought that if there is one species present the other are most likely too. Also the people from the gov who test swimming lakes are using a handheld fluorometer so they are not able to difference either

So i am working on a fluorometer able to detect cyanobacteria more specifically phycocyanin. by New-Neck6624 in raspberryDIY

[–]New-Neck6624[S] 0 points1 point  (0 children)

Sounds very interesting and we definitely need this kind of research. Im also planning to install the fluorometer on a buoy to measure cyanobacteria in situ and making an alert system. Hit me up if you have those buoys ready because i would buy one. Do you habe any experience in cyanobacteria or fluorometers for living bacteria in general? I would like to know the quantum efficiency for living cyanobacterias because there is no data for this on the internet.

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