Reagents for HI 770 Checker HC ®, 25 Tests

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

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 0.0 - 30.0 ppm | amino acid method | Resolution 0.1ppm

Range 0.00 - 9.99 ppm NH3-N | Nessler Method | 0.01ppm resolution