Calibration Standard HI 770 Checker HC ®

Range 0:00 to 3:50 ppm | USEPA Method 330.5 / DPD | Resolution 0.01ppm

Range 0 - 150 ppm | ferrous sulfate method | Resolution 1ppm

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 - 500 PCU | Platinum Cobalt method | Resolution 5 PCU