Calibration Standard HI 706 Checker HC ®

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 0:00 to 3:00 ppm NH3-N | Nessler Method | 0.01ppm resolution