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Calibration Standard for HI 721 Checker HC ®
| Weight | 0.000 kg |
|---|
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Range 0 - 20 ppm | ESPA method | Resolution 0.1ppm
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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 - 200 ppb | ascorbic acid method | Resolution 1 ppb
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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.