Reagents for HI 723 Checker HC ®, 25 Tests

Range 0 - 200 ppb | ascorbic acid method | Resolution 1 ppb

The HI 764 Checker®HC is extremely simple to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the HI 764 Checker®HC, press the button and read the results. It’s that easy.

Range 0 - 20 ppm | ESPA method | Resolution 0.1ppm