Hanna Checker Marine pH HI-780-25 Reagents (100 tests)

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Press the ON/OFF button to turn the checker on. All segments will be displayed for a few seconds, followed by “Add”, “C.1” with “Press” blinking.


Fill the cuvette with 10 mL of unreacted sample and replace the cap. Insert the cuvette into the checker and close the cap


Press the ON/OFF button. When the display shows “Add”, “C.2” with “Press” blinking, the checker is zeroed