Reagents for HI 717 Checker HC ®, 40 Tests

Range 0 - 200 ppb | ascorbic acid method | Resolution 1 ppb

Range 0.0 - 99.9 ppm NH3-N | Nessler Method | 0.1ppm resolution

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 - 20 ppm | ESPA method | Resolution 0.1ppm