Calibration Standard HI 706 Checker HC ®

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

Range 0-999 ppb | ASTM Method D1687-92 diphenylcarbonate | Resolution 1 ppb

Range 0 - 20 ppm | ESPA method | Resolution 0.1ppm

The HI 775 Checker®HC is a simple, accurate, and cost effective way to measure alkalinity. Designed as a more accurate alternative to chemical test kits, the HI 775 provides quick, accurate results in four easy steps.