Reagents for Freshwater Alkalinity HI 775 Checker HC ®, 25 Tests

Range 0:00 to 2:50 ppm | ascorbic acid method | Resolution 0.01ppm

Range 0 - 20 ppm | ESPA method | Resolution 0.1ppm

Range 0:00 to 7:00 g / L | Photometric Method | Resolution 0.01g / L

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.