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Hanna Fluoride High Range Checker® HC Calibration Check Set HI739 11 portable EC tester Combining the rugged MW102 PRO+ fructose refractometer Combining the rugged MW102 PRO+ meter with the specialist MA920B 1 food grade pH probe and a protective MI0028 hard carrying case Measurement: Dissolved Oxygen (DO) in mg L or ppm 0 ppm (mg L) fluoride The calibration check set is produced in our state of the art manufacturing facility using reagent grade chemicals in a temperature controlled environment
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