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Re: TDS meters and Microsiemens meters:Bill Shenefelt
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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