Calibration Standard HI 771 Checker HC ®

Reagents for HI 755 Checker HC ®, 25 Tests

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 0.0 - 99.9 ppm NH3-N | Nessler Method | 0.1ppm resolution

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