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Spectrometer

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PlainName:
I am considering the purchase of a spectrometer (primarily for LED classification but also other colour-related things) and my affordable choice seems to be either a HP330/HP320 or HPCS 330P. Anyone have experience of these, or anything similar?

At first glance the HPCS 330P would be my choice on account of the detachable head, so there is no struggling to read the screen because it's at whatever angle is necessary to capture the light. The head is sold by itself (and cheaper), and is then used by connecting to a PC or phone for the display. But... it seems that the phone app isn't actually a phone app but a WeChat application, so one needs to be running WeChat in order to use it (brrrr!).

The HP330 has slightly better specs and you can choose between the input orientation, but once chosen that's it and it's not going to be right for all situations.

Done a search on here for opinions or any other comments and nothing turned up, but I figured someone might have one (or similar) and not had any reason to post about it. Now's the time :)

edpalmer42:
Have you considered a low-tech DIY spectrometer using a DVD and a cardboard box?

If you search for <spectrometer DVD>, you'll find lots of projects to do just that.  There was a site called spectralworkbench.org that had a lot of good info including software.  It looks like the site died due to lack of interest, but the Internet Archive did some extra special archiving.

https://web.archive.org/web/20220308025831/https://spectralworkbench.org/ <-- normal site backup

https://web.archive.org/web/20240705205259/https://spectralworkbench.org/ <-- info on the special archiving.

metrologist:
Cool!

PlainName:

--- Quote ---Have you considered a low-tech DIY spectrometer using a DVD and a cardboard box?
--- End quote ---

Yes, and even got a ThunderOptics jobby. Decided I want to use one rather than dick about trying to make it show something possibly related.

An all-in-one (that is, not requiring a PC or phone) is attractive on that basis, but at the same time the ability to hook up an external viewer (to circumvent the display/sensor alignment) might turn out to be nice.

BillyO:
Maybe a physics forum would be a better place to ask this.  What is your budget?

It seems to me that maybe a decent optical spectrometer would suit your needs.  They are not too horrendously expensive for one that meets research quality needs.  Purely electronic spectrometers at that level are possibly considerably more expensive.  Perhaps some sort of hybrid is what you are after?  Do you need to observe and manually record results or does your use case involve automated data collection?

The HP330 does not strike me as a "real" spectrometer, but that may actually meet your needs.  I'm all for folks finding cheap kit that delivers the results they need.

Sorry, but I have no real answers for you.  The last fully electronic spectrometers I used where back in my university days and they cost as much as a Lamborghini back then.  I used them quite a bit in my studies.

Good luck in finding what you need.  Sounds like a cool project.

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