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Calibration checking set for Checker®HC HI 764 Nitrite Ultra Low Range.
(0 and 100 ppb nitrite)
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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.
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Range 0.0 - 99.9 ppm NH3-N | Nessler Method | 0.1ppm resolution
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Range 0 - 600 ppb NO2-N | EPA method 354.1 | Resolution 1 ppb
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Reagents for HI 755 Checker HC ®, 25 Tests
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The HI 771 Checker®HC is a simple, accurate, and cost effective way to measure ultra-high ranges of chlorine. Designed as a more accurate alternative to chemical test kits, the HI 771 provides quick, accurate results in four easy steps.
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Range 0:00 to 3:50 ppm | USEPA Method 330.5 / DPD | Resolution 0.01ppm
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Range 0.0 - 12.5 ppm | DPD Method | Resolution 0.1ppm
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Range 0:00 to 2:50 ppm | ascorbic acid method | Resolution 0.01ppm