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Any decent, inexpensive, TDS/conductivity/salinity meters?

Started by Guest_Newt_* , Dec 18 2009 01:32 PM

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7 replies to this topic

#1 Guest_Newt_*

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Posted 18 December 2009 - 01:32 PM

I just want something for my personal edification when sampling. I can't afford a YSI or anything remotely in that price range, but I want something easier and quicker to use than a reagent kit.

This is the closest I have found to what I want, but it only ranges up to 9990 μS (about 1/5 the salinity of seawater):

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#2 Guest_fundulus_*

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Posted 18 December 2009 - 02:00 PM

I've been using a Hanna Instruments TDS 1 meter that I bought 6 years ago for $15 as a special offer. I think they typically sell for $30-40. I've been happy with it, but it is a low-range meter as described above. YSI equipment is great but I'm not on a guvmint grant either.

#3 Guest_Newt_*

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Posted 18 December 2009 - 02:16 PM

Thanks Fundulus. It looks like Amazon.com has the Hanna model for about what you paid. I suppose I could get one of those for freshwater, plus a refractometer for coastal stuff, if I can't find an all-purpose device.

#4 Guest_ashtonmj_*

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Posted 18 December 2009 - 03:09 PM

YSI is crap. The 600 series, like 650 MDS, is an excersise in planned obsolesence. The pH probe has to be replaced every two years REGARDLESS of the number of times you use it.

#5 Guest_fundulus_*

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Posted 18 December 2009 - 03:21 PM

Companies can change. When I was in graduate school we had a YSI oxygen/salinity meter that was great, a model from the late 70s I'd guess. I haven't worked with any of their recent models.

#6 Guest_dmarkley_*

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Posted 21 December 2009 - 10:04 AM

I just want something for my personal edification when sampling. I can't afford a YSI or anything remotely in that price range, but I want something easier and quicker to use than a reagent kit.

This is the closest I have found to what I want, but it only ranges up to 9990 μS (about 1/5 the salinity of seawater):

I use a similar instrument in my lab here at work. Don't let that limited range stop you. If you have a sample outside the range, simply dilute it accordingly with distilled water and back calculate. Not a lot of work.

Dean