The Color of Water Checker® HC Calibration Check Set – HI727-11 provides a simple solution to validating the Color of Water Checker® HC -HI727 that has a range of 0 to 500 PCU. This high-quality set of standards is manufactured in our state-of-the-art facility and comes supplied with a Certificate of Analysis. The Certificate of Analysis provides the lot number, reference values and expiration date for traceability when certifying the Checker® HC.
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