Calibration Standard HI 770 Checker HC ®

Range 0:00 to 5:00 ppm | EPA Method 315 B | 0.01ppm resolution

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.