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BriSunshine Lab Turbidity Meter, Handheld Portable Turbidimeter for Testing Turbidity of Liquids, Measuring Range 0-200 NTU, ISO 9000 Compliant: Amazon.com: Industrial & Scientific
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NEWTRY Turbidity Meter, Portable Digital Water Turbidimeter, ISO7027 Compliant, Accuracy 0.1, 0-200NTU, LCD with Backlight, for Lab Water Treatment Plant Wine Industry: Amazon.com: Industrial & Scientific
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