Calibration Standard HI 770 Checker HC ®

Range 0:00 to 2:00 ppm | ASTM D859 Method | 0.01ppm resolution

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.