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Re: TDS meters and Microsiemens meters:Bill Shenefelt
Hello Lee,
Thanks! I looked only at the instrument shown at the cited page, didn't
think to look over the entire site. But even after I knew that there is
another hardness instrument, it took me a while to find it!
Best,
George
LeeH920226 at aol_com wrote:
>
> In a message dated 8/25/2000 10:29:14 PM, yurko at warwick_net writes:
>
> <<
> An interesting meter, but I don't know how practical this Hanna "Total
> Hardness Meter" would be, because its range is from 0.00 to 4.70
> mg/liter (about 1/4 of German degree of hardness [dGH] maximum) >>
>
> George,
> They have a meter which measures total hardness up to 750 mg/liter. It is
> described as follows:
>
> ------------------------------------------------------------------------
> Total hardness, that is presence of magnesium and calcium, is due mainly to
> the run-off water dissolving these salts as it flows or filters through
> different strata. Hardness can also be caused by corrosion of pipes in
> cooling and heating systems, as well as due to reverse osmosis and
> demineralization plants. The Hanna hardness meter, HI 93735, measures total
> hardness in three different scales: 0 to 250, 200 to 500 and 400 to 750 ppm,
> covering an extensive range of applications. With HI 93735 hardness can be
> measured in ppm (mg/L) as well as in French (°fH), German (°dH) and English
> hardness (°eH). The reading is expressed directly in ppm and it is not
> necessary to use conversion tables and diagrams for interpretation. The
> reagents for this instrument are available in powder as well as in liquid
> forms.
> Specifications:
> Range: 0 to 250 mg/L; 200 to 500 mg/L; 400 to 750 mg/L
> Accuracy: ±5 mg/L or ±4% of reading (0 to 250 mg/L);
> ±7 mg/L or ±3% (200 to 500 mg/L);
> ±10 mg/L or ±2% (400 to 750 mg/L)
>
> Costs $149
>
> Lee Harper
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