Calibration Standard HI 764 Checker HC ®

Range 0.0 - 8.0 ppm | DPD method | Resolution 0.1ppm

Range 0.0 - 99.9 ppm NH3-N | Nessler Method | 0.1ppm 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.

The HI 771 Checker®HC is a simple, accurate, and cost effective way to measure ultra-high ranges of chlorine. Designed as a more accurate alternative to chemical test kits, the HI 771 provides quick, accurate results in four easy steps.