Reagents for HI 758 Checker HC ®, 25 Tests

Range 0 - 600 ppb NO2-N | EPA method 354.1 | Resolution 1 ppb

Range 0:00 to 2:00 ppm | EPA method 340.1 | 0.01ppm resolution

Range 0.0 - 12.5 ppm | DPD Method | Resolution 0.1ppm