[DIYbio] Re: Does Anyone Know Of A Submersible Arduino/RaspberryPI Compatible Spectrometer?

• under $200, I think you are looking at camera-based solutions, with a healthy dose of DIY and low dynamic range .. or maybe a spinning-mirror setup (lots of tweaking to get it working well) .. or maybe a DIY TCD1304 solution (tough to get the optics really dialed in and calibrated, if that matters in your app).
• Mid $200-ish, you can probably make a Hamamatsu micro-spec based solution, again with a healthy dose of DIY
• need to amplify the module's video signal, need to make light-sources, need to enclose everything in a water-tight container etc.
• spectral resolution ~15nm, dynamic range depends on conversion method.  12-bit converters will probably give about 10 usable bits
• A bit over $300-ish, you can make a Hamamatsu micro-spec based solution, with just a little DIY
• Light-sources, signal amps etc. already designed with PureEngineering carrier module.  Need to make water-tight package and add Arduino or other micro for acquisition.
• spectral resolution ~15nm, dynamic range depends on conversion method.  12-bit converters will probably give about 10 usable bits
•  $400+, I think that you can add a fiber extensions for light and signal to a Pasco PS-2600 or a Vernier Spectrovis (same machine, I think)
• Spectral resolution ~3nm,  Conversion appears to be 12-bit. Decent free software.  No standard support for Arduino or RPi.
• Water-proofing is easy, I think, if you use fiber-optic extensions
• $1000+ -- The options open way up, with Ocean Optics and a lot of similar modular specs.  Not sure about interfacing methods.

 I would use fiber optic input and leave the spectrometer out. Ocean optics used to have small one and probably lots of other companies.  

On Sunday, September 3, 2017 at 2:59:25 AM UTC-5, Cory Geesaman wrote:

The subject pretty much says it - I'm trying to find a (hopefully cheap - under $200) Arduino or RaspberryPI compatible photospectrometer which can be submerged for long periods of time in water to log water quality.  I've been searching around a bit and can't find any, but if someone knows of one which could be hacked fairly easily (sticking it in a new case for instance) that would be great too.  I'm not too worried about calibration (I can calibrate the thing and write the code needed to identify different ions from a bunch of data,) just want to avoid having to designed the thing from a capillary tube up though light sources and sensor if at all possible.