I am working on a project that requires me to reverse engineer a BioPhotometer and build a new one with modifications. The part where I am stuck is a photodiode that measures wavelengths between 230nm to 600nm.

I know fundamentals of photodiodes, but I was not sure is a single photodiode can measure this range of wavelengths. ?

Or are there special photodiodes (array) that have multiple photodiodes built into them which measure different wavelengths and hence combine to make a broad spectrum photodiode equivalent. ?

Hope I have made this clear.

 

Photodiodes will respond to a range of wavelengths.

 

Can you mention some photodiode that might be able to sense the range of wavelengths that I have mentioned.

Link or part number? I have seen a few and none of them had the range that I am looking for. That is what lead me to beleive that may be there is a possibility of many photo diodes packaged as a single one? Possible?

 

Google UV photodiodes.

 

Hello,

Have a look at the following pdf's:
http://educypedia.karadimov.info/library/photodiode_technical_information.pdf
http://educypedia.karadimov.info/library/pd_char.pdf

Bertus

 

Try a BPW21r for starters...

 

Try Hamamatsu or Advanced Photonix
They have some off the wall stuff.

I've been meaning to get back to a project I started back in 2010 doing a PAR sensor for 400-700nm and was looking at their stuff back then

 

Try a BPW21r for starters...

That was my starting point too, but my requirement requires something more wideband.

 

Hello,

Have a look at the following pdf's:
http://educypedia.karadimov.info/library/photodiode_technical_information.pdf
http://educypedia.karadimov.info/library/pd_char.pdf

Bertus

Thanks, this is the kind of stuff I was looking for.