HI93735-00 Hardness Total (0 to 250 mg/L) – Reagents -100 Tests

The HI 761 uses an adaptation of the USEPA method 330.5. The reaction between the chlorine and DPD reagent causes a pink tint in the sample.

Range 0 - 300 ppm in salt water | Colorimetric Method | Resolution 1 ppm

Range 0 - 150 ppm | ferrous sulfate method | Resolution 1ppm