Hanna Checker HC Handheld Colorimeter - Calcium
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No more inaccurate test kits! Hanna Checker HC handheld colorimeter takes a 10mL sample of water and accurately represents a digital reading of aquarium water calcium content. Accurate to plus or minus .04 ppm. Great for quick, accurate on the spot tests and analysis. Auto-shut off maintains battery life. Single-button operation - simply choose zero or measure. Operates with one AAA battery. Includes carrying case and two sample bottles.
The HI 758 Calcium Checker HC is extremely simple to use. First, zero the instrument by adding Reagent A and deionized water into the vial. Insert into the HI 758 and press the button. Next, remove the vial and add 0.1ml of sample and add Reagent B; shake to dissolve. Reinsert into the Checker HC and press the button to read the calcium concentration in ppm on the display.